diff --git a/src/app/api/labs/[id]/route.ts b/src/app/api/labs/[id]/route.ts
index e8363b6e5..c828bdf1f 100644
--- a/src/app/api/labs/[id]/route.ts
+++ b/src/app/api/labs/[id]/route.ts
@@ -192,6 +192,9 @@ export const PUT = apiHandler(
     const data: Record<string, unknown> = {};
     if (d.panel !== undefined) data.panel = d.panel;
     if (d.analyte !== undefined) data.analyte = d.analyte;
+    // Set when a changed value retires a conversion whose printed range text is
+    // in the report's unit (see below).
+    let dropPrintedText = false;
     if (d.value !== undefined) {
       data.value = d.value;
       // A number the person typed is no longer the conversion of what the
@@ -205,6 +208,18 @@ export const PUT = apiHandler(
       ) {
         data.sourceValue = null;
         data.sourceUnit = null;
+        // The printed range text belonged to the printed value and is written
+        // in the report's unit. With `sourceUnit` gone nothing would say so,
+        // and every reader would present it as the marker unit's window, so
+        // it goes with the record. The bounds stay: they were converted with
+        // the value and are already in the marker's unit.
+        if (
+          existing.sourceUnit !== null &&
+          existing.sourceReferenceText !== null
+        ) {
+          data.sourceReferenceText = null;
+          dropPrintedText = true;
+        }
       }
     }
     // v1.18.9 — qualitative edit. A row stays single-typed: editing `value` on a
@@ -220,7 +235,15 @@ export const PUT = apiHandler(
     if (d.sourceReferenceHigh !== undefined) {
       data.sourceReferenceHigh = d.sourceReferenceHigh;
     }
-    if (d.sourceReferenceText !== undefined) {
+    // A whole-form echo of the old printed text does not bring it back once the
+    // value change retired it; a text that differs is a new statement and wins.
+    if (
+      d.sourceReferenceText !== undefined &&
+      !(
+        dropPrintedText &&
+        d.sourceReferenceText === existing.sourceReferenceText
+      )
+    ) {
       data.sourceReferenceText = d.sourceReferenceText;
     }
     if (d.takenAt !== undefined) data.takenAt = d.takenAt;
diff --git a/src/lib/labs/__tests__/value-update.test.ts b/src/lib/labs/__tests__/value-update.test.ts
index dcc98d4c8..c952d06ad 100644
--- a/src/lib/labs/__tests__/value-update.test.ts
+++ b/src/lib/labs/__tests__/value-update.test.ts
@@ -12,6 +12,18 @@ describe("valueEditSeed", () => {
     expect(valueEditSeed(110)).toBe("110");
     expect(valueEditSeed(4.567)).toBe("4.57");
   });
+
+  it("never opens a small nonzero value as zero", () => {
+    expect(valueEditSeed(0.004)).toBe("0.004");
+    expect(valueEditSeed(0.0123456)).toBe("0.0123");
+    expect(valueEditSeed(0.87)).toBe("0.87");
+    expect(valueEditSeed(0.123456)).toBe("0.123");
+    expect(valueEditSeed(-0.004)).toBe("-0.004");
+    expect(valueEditSeed(0.0000004)).toBe("0.0000004");
+    for (const v of [0.004, 0.0004, 0.00004, 1e-9]) {
+      expect(Number(valueEditSeed(v))).not.toBe(0);
+    }
+  });
 });
 
 describe("resolveValueForUpdate", () => {
diff --git a/src/lib/labs/value-update.ts b/src/lib/labs/value-update.ts
index 5cbbad305..7dd945dc5 100644
--- a/src/lib/labs/value-update.ts
+++ b/src/lib/labs/value-update.ts
@@ -1,18 +1,33 @@
-import { formatLabValue } from "./format-value";
-
 /**
  * The numeric value of a lab reading in the edit sheet.
  *
  * A converted reading is stored at full precision (5.6 mmol/L of glucose is
  * 100.90191999999999 mg/dL), and the sheet must not open with that tail. The
- * field starts from the value as every lab surface shows it: whole numbers
- * bare, at most two decimals. Written with a dot, which the sheet's parser
- * reads, rather than in the reader's locale, which an input cannot round-trip.
+ * field starts from the value at the precision every lab surface shows it:
+ * whole numbers bare, two decimals. Two decimals carry too little of a small
+ * value, though (a TSH of 0.004 would open as "0"), so below 1 the field keeps
+ * three significant figures instead. Written with a dot, which the sheet's
+ * parser reads, rather than in the reader's locale, which an input cannot
+ * round-trip, and never in exponent notation.
  */
 export function valueEditSeed(value: number): string {
-  return formatLabValue(value, String);
+  if (Number.isInteger(value)) return String(value);
+  const magnitude = Math.floor(Math.log10(Math.abs(value)));
+  const decimals = Math.min(
+    MAX_SEED_DECIMALS,
+    Math.max(DISPLAY_DECIMALS, SEED_SIGNIFICANT_FIGURES - 1 - magnitude),
+  );
+  return value
+    .toFixed(decimals)
+    .replace(/(\.\d*?)0+$/, "$1")
+    .replace(/\.$/, "");
 }
 
+const DISPLAY_DECIMALS = 2;
+const SEED_SIGNIFICANT_FIGURES = 3;
+/** `toFixed` accepts up to 100; no lab value needs more than this. */
+const MAX_SEED_DECIMALS = 20;
+
 /**
  * What the edit PUT sends for the value. A field the person did not touch is
  * omitted (`undefined`), so the stored full-precision number stays as it is and
diff --git a/src/lib/oura/__tests__/sync.test.ts b/src/lib/oura/__tests__/sync.test.ts
index 4f819d2e1..691199cee 100644
--- a/src/lib/oura/__tests__/sync.test.ts
+++ b/src/lib/oura/__tests__/sync.test.ts
@@ -950,6 +950,50 @@ describe("syncUserOura — a grant without the spo2 / heart_health scopes", () =
     expect(recordSuccessMock).toHaveBeenCalledWith("u1", "oura");
   });
 
+  it("keeps a 401 on a core collection a failure even when siblings succeed", async () => {
+    getConnMock.mockResolvedValue(CONN);
+    fetchReadinessMock.mockResolvedValue([
+      { id: "x", day: "2026-06-10", score: 70 },
+    ]);
+    fetchSleepMock.mockRejectedValue(err401());
+    refreshMock.mockResolvedValue({
+      access_token: "newAcc",
+      refresh_token: "newRef",
+      expires_in: 86400,
+    });
+
+    const result = await syncUserOura("u1");
+
+    expect(refreshMock).toHaveBeenCalledTimes(1);
+    expect(result.failed).toBe(true);
+    expect(scopeDeniedMock).not.toHaveBeenCalledWith(
+      "u1",
+      expect.arrayContaining(["sleep"]),
+    );
+    expect(recordFailureMock).toHaveBeenCalledWith(
+      expect.objectContaining({ integration: "oura" }),
+    );
+    expect(recordSuccessMock).not.toHaveBeenCalled();
+  });
+
+  it("does not let a stored core name skip the refresh", async () => {
+    getConnMock.mockResolvedValue({ ...CONN, scopeDenied: ["sleep"] });
+    fetchReadinessMock.mockResolvedValue([
+      { id: "x", day: "2026-06-10", score: 70 },
+    ]);
+    fetchSleepMock.mockRejectedValueOnce(err401()).mockResolvedValue([]);
+    refreshMock.mockResolvedValue({
+      access_token: "newAcc",
+      refresh_token: "newRef",
+      expires_in: 86400,
+    });
+
+    const result = await syncUserOura("u1");
+
+    expect(refreshMock).toHaveBeenCalledTimes(1);
+    expect(result.failed).toBe(false);
+  });
+
   it("still treats a 401 on every collection as a dead token", async () => {
     getConnMock.mockResolvedValue(CONN);
     for (const m of [
@@ -973,9 +1017,40 @@ describe("syncUserOura — a grant without the spo2 / heart_health scopes", () =
     const result = await syncUserOura("u1");
 
     expect(result.failed).toBe(true);
-    expect(scopeDeniedMock).toHaveBeenCalledWith("u1", []);
+    // Nothing proved the token, so nothing was learned about the grant.
+    expect(scopeDeniedMock).not.toHaveBeenCalled();
     expect(recordFailureMock).toHaveBeenCalledWith(
       expect.objectContaining({ integration: "oura", kind: "reauth_required" }),
     );
   });
+
+  it("keeps the scope note when the refresh is abandoned for want of credentials", async () => {
+    getConnMock.mockResolvedValue({ ...CONN, scopeDenied: SCOPED });
+    // A new 401 the note does not explain sends the run to the refresh.
+    fetchSleepMock.mockRejectedValue(err401());
+    denyScopedCollections();
+    getCredsMock.mockResolvedValue(null);
+
+    await syncUserOura("u1");
+
+    expect(refreshMock).not.toHaveBeenCalled();
+    expect(scopeDeniedMock).not.toHaveBeenCalled();
+  });
+
+  it("keeps the scope note when the refresh loses its token to a peer", async () => {
+    getConnMock.mockResolvedValue({ ...CONN, scopeDenied: SCOPED });
+    fetchSleepMock.mockRejectedValue(err401());
+    denyScopedCollections();
+    refreshMock.mockResolvedValue({
+      access_token: "newAcc",
+      refresh_token: "newRef",
+      expires_in: 86400,
+    });
+    storeTokensMock.mockResolvedValue(null);
+
+    await syncUserOura("u1");
+
+    expect(refreshMock).toHaveBeenCalledTimes(1);
+    expect(scopeDeniedMock).not.toHaveBeenCalled();
+  });
 });
diff --git a/src/lib/oura/sync.ts b/src/lib/oura/sync.ts
index c1c8d4b5d..d9d764f53 100644
--- a/src/lib/oura/sync.ts
+++ b/src/lib/oura/sync.ts
@@ -91,6 +91,7 @@ import {
 } from "./credentials";
 import { OuraApiError, classifyOuraError } from "./response-classifier";
 import { syncUserOuraCyclePhases } from "./cycle-sync";
+import { OURA_SCOPE_GATED_COLLECTIONS } from "./scope";
 import { shiftDateKey, userDayKey } from "@/lib/tz/format";
 import { resolveUserTimezone } from "@/lib/tz/resolver";
 
@@ -245,11 +246,13 @@ export interface OuraFetchResult {
    */
   sleepSweeps: SleepSegmentSweep[];
   /**
-   * Collections refused with 401/403 while a sibling succeeded with the same
+   * Collections refused with 401 while a sibling succeeded with the same
    * token: the token is fine, the grant does not cover them. Not failures; the
-   * card asks for one reconnect instead.
+   * card asks for one reconnect instead. `null` when the run never proved the
+   * token (no collection succeeded, or the refresh was abandoned): it learned
+   * nothing about the grant, so the note from the last run that did stands.
    */
-  scopeDenied: string[];
+  scopeDenied: string[] | null;
 }
 
 /**
@@ -261,24 +264,35 @@ function isAuthRefusal(err: unknown): boolean {
   return err instanceof OuraApiError && err.httpStatus === 401;
 }
 
+const SCOPE_GATED: ReadonlySet<string> = new Set(OURA_SCOPE_GATED_COLLECTIONS);
+
 /**
- * Split the auth refusals out of a run's failures once a sibling collection has
- * proven the token. Oura's authorization server enforces scopes per collection,
- * so a grant issued without `spo2` / `heart_health` answers 401 on exactly the
- * collections behind them and 200 everywhere else. Counting those toward the
- * reconnect ladder painted a working connection as broken on every sync, and
- * refreshing the token over them changed nothing.
+ * A 401 that can be the grant's scope rather than the token: only the
+ * collections behind `spo2` / `heart_health` sit outside the `daily` scope
+ * every grant carries. A 401 on sleep, readiness or activity is a real auth
+ * failure whatever its siblings did.
+ */
+function isScopeRefusal(f: OuraCollectionFailure): boolean {
+  return SCOPE_GATED.has(f.name) && isAuthRefusal(f.err);
+}
+
+/**
+ * Split the scope refusals out of a run's failures once a sibling collection
+ * has proven the token. Oura's authorization server enforces scopes per
+ * collection, so a grant issued without `spo2` / `heart_health` answers 401 on
+ * exactly the collections behind them and 200 everywhere else. Counting those
+ * toward the reconnect ladder painted a working connection as broken on every
+ * sync, and refreshing the token over them changed nothing. Any other failure,
+ * a 401 on a core collection included, stays a failure.
  */
 function splitScopeDenied(
   failures: OuraCollectionFailure[],
   tokenProven: boolean,
-): { failures: OuraCollectionFailure[]; scopeDenied: string[] } {
-  if (!tokenProven) return { failures, scopeDenied: [] };
+): { failures: OuraCollectionFailure[]; scopeDenied: string[] | null } {
+  if (!tokenProven) return { failures, scopeDenied: null };
   return {
-    failures: failures.filter((f) => !isAuthRefusal(f.err)),
-    scopeDenied: failures
-      .filter((f) => isAuthRefusal(f.err))
-      .map((f) => f.name),
+    failures: failures.filter((f) => !isScopeRefusal(f)),
+    scopeDenied: failures.filter(isScopeRefusal).map((f) => f.name),
   };
 }
 
@@ -455,7 +469,9 @@ async function fetchAll(
   // to collections that succeeded, is the grant's scope again: a refresh cannot
   // widen it, so none is spent. Any other 401 still takes the one refresh, and
   // whatever 401s after it beside a success is recorded as scope.
-  const knownDenied = new Set(knownScopeDenied);
+  const knownDenied = new Set(
+    knownScopeDenied.filter((name) => SCOPE_GATED.has(name)),
+  );
   const onlyKnownScope401 = first.failures
     .filter((f) => isAuthRefusal(f.err))
     .every((f) => knownDenied.has(f.name));
@@ -476,7 +492,7 @@ async function fetchAll(
       readings: first.readings,
       failures: first.failures,
       sleepSweeps,
-      scopeDenied: [],
+      scopeDenied: null,
     };
 
   const rotated = await refreshAccessToken(refreshToken, creds);
@@ -494,7 +510,7 @@ async function fetchAll(
       readings: first.readings,
       failures: first.failures,
       sleepSweeps,
-      scopeDenied: [],
+      scopeDenied: null,
     };
 
   const retry = await attempt(usableToken, first.failed);
@@ -551,15 +567,20 @@ export async function syncUserOura(
   // Remember which collections the grant does not cover, so the settings card
   // can ask for one reconnect. Best-effort: the note is a convenience, the
   // sync outcome does not depend on it.
-  if (result.scopeDenied.length > 0) {
+  // A run that never proved the token says nothing about the grant and leaves
+  // the note as it was.
+  const scopeDenied = result.scopeDenied;
+  if (scopeDenied && scopeDenied.length > 0) {
     annotate({
-      meta: { oura_scope_denied: result.scopeDenied },
+      meta: { oura_scope_denied: scopeDenied },
     });
   }
-  try {
-    await syncOuraScopeDenied(userId, result.scopeDenied);
-  } catch (err) {
-    getEvent()?.addWarning(`oura: scope note write failed: ${err}`);
+  if (scopeDenied) {
+    try {
+      await syncOuraScopeDenied(userId, scopeDenied);
+    } catch (err) {
+      getEvent()?.addWarning(`oura: scope note write failed: ${err}`);
+    }
   }
 
   // Clear whatever an earlier scoring left under the re-fetched sleep records
diff --git a/src/lib/withings/__tests__/sync-plan.test.ts b/src/lib/withings/__tests__/sync-plan.test.ts
index 24ab77259..89834898e 100644
--- a/src/lib/withings/__tests__/sync-plan.test.ts
+++ b/src/lib/withings/__tests__/sync-plan.test.ts
@@ -105,10 +105,12 @@ import {
 import {
   releasePlanGatedWithingsParks,
   requestWithinPlan,
+  shouldPersistPlanLeg,
   WITHINGS_ADVANCED_MEASTYPES,
   WITHINGS_PLAN_MAX_REQUESTS,
 } from "../api-plan";
 import { withingsPlanUnavailableFeatures } from "../plan-features";
+import { WITHINGS_MEASTYPES } from "../client";
 
 const LAST_GOOD_SYNC = new Date("2026-10-12T21:12:00Z");
 
@@ -315,6 +317,102 @@ describe("syncUserMeasurements inside the Withings API plan", () => {
     expect(recordSyncFailure).not.toHaveBeenCalled();
   });
 
+  it("never remembers a type the budget could not resolve, and converges over runs", async () => {
+    // Two undocumented refusals on top of the documented set. Over the 19
+    // types the first run runs out of budget before it reaches 12, 54, 71,
+    // 76, 77 and 88, all free.
+    refused = new Set([...WITHINGS_ADVANCED_MEASTYPES, 6, 35]);
+    let stored: unknown = null;
+    let lastSyncedAt = LAST_GOOD_SYNC;
+    vi.mocked(prisma.withingsConnection.findUnique).mockImplementation(
+      (async () => connection(stored, lastSyncedAt)) as never,
+    );
+    vi.mocked(prisma.withingsConnection.update).mockImplementation(
+      (async (args: { data: { lastSyncedAt: Date } }) => {
+        lastSyncedAt = args.data.lastSyncedAt;
+        return {};
+      }) as never,
+    );
+    const runs: Array<{ unavailable: number[]; startdates: string[] }> = [];
+    const read = new Set<number>();
+
+    for (let run = 0; run < 4; run++) {
+      vi.mocked(prisma.$executeRaw).mockClear();
+      vi.mocked(prisma.measurement.create).mockClear();
+      requestedStartdates.length = 0;
+      await syncUserMeasurements("user-1");
+      const [persisted] = persistedLegs();
+      if (persisted) {
+        const value = persisted.value as {
+          unavailable: number[];
+          checkedAt: string;
+        };
+        stored = { version: 1, measures: value };
+      }
+      for (const types of requestedTypes.splice(0)) {
+        if (!types.some((t) => refused.has(t)))
+          types.forEach((t) => read.add(t));
+      }
+      const current = stored as {
+        measures?: { unavailable: number[] };
+      } | null;
+      runs.push({
+        unavailable: current?.measures?.unavailable ?? [],
+        startdates: [...requestedStartdates],
+      });
+    }
+
+    const truly = [...refused].sort((a, b) => a - b);
+    // No run ever stored a type Withings did not refuse.
+    for (const r of runs) {
+      expect(r.unavailable.every((t) => refused.has(t))).toBe(true);
+    }
+    expect(runs.at(-1)!.unavailable).toEqual(truly);
+    // Every type the plan allows was read in an accepted request, the free
+    // ones the first run never reached included.
+    expect(read).toEqual(
+      new Set(WITHINGS_MEASTYPES.filter((t) => !refused.has(t))),
+    );
+    expect([...read]).toEqual(expect.arrayContaining([12, 54, 71, 76, 77, 88]));
+    // The first run read nothing for the unresolved types, so the second
+    // still reads from the last good sync.
+    const fromLastGood = String(
+      Math.floor(
+        (LAST_GOOD_SYNC.getTime() - WITHINGS_INCREMENTAL_OVERLAP_MS) / 1000,
+      ),
+    );
+    expect(runs[1]!.startdates.every((s) => s === fromLastGood)).toBe(true);
+  });
+
+  it("keeps the remembered date when a run that is not the re-probe finds one more refusal", async () => {
+    const remembered = new Date(Date.now() - 3 * 86_400_000).toISOString();
+    vi.mocked(prisma.withingsConnection.findUnique).mockResolvedValue(
+      connection({
+        version: 1,
+        measures: {
+          unavailable: [...WITHINGS_ADVANCED_MEASTYPES],
+          checkedAt: remembered,
+        },
+      }) as never,
+    );
+    // The plan starts refusing fat ratio too.
+    refused = new Set([...WITHINGS_ADVANCED_MEASTYPES, 6]);
+
+    await syncUserMeasurements("user-1");
+
+    expect(persistedLegs()).toEqual([
+      {
+        leg: "measures",
+        value: {
+          unavailable: [6, ...WITHINGS_ADVANCED_MEASTYPES].sort(
+            (a, b) => a - b,
+          ),
+          checkedAt: remembered,
+        },
+      },
+    ]);
+  });
+
   it("reads the whole gap since the last good sync", async () => {
     await syncUserMeasurements("user-1");
 
@@ -326,19 +424,128 @@ describe("syncUserMeasurements inside the Withings API plan", () => {
     expect(requestedStartdates.every((s) => s === expected)).toBe(true);
   });
 
-  it("holds the watermark and records no failure when the plan refuses everything", async () => {
+  it("treats a run where every request was refused as transient: nothing remembered, watermark held", async () => {
     refused = new Set([
       1, 5, 6, 8, 9, 10, 11, 12, 35, 54, 71, 76, 77, 88, 91, 123, 155, 170, 73,
     ]);
 
     const result = await syncUserMeasurements("user-1");
 
-    expect(result).toEqual({ imported: 0, failed: false });
+    expect(result).toEqual({ imported: 0, failed: true });
     expect(prisma.withingsConnection.update).not.toHaveBeenCalled();
+    // A 277 stays off the ledger, and a run that read nothing is no success.
     expect(recordSyncFailure).not.toHaveBeenCalled();
+    expect(recordSyncSuccess).not.toHaveBeenCalled();
     expect(requestedTypes.length).toBeLessThanOrEqual(
       WITHINGS_PLAN_MAX_REQUESTS,
     );
+    // Weight and blood pressure are not remembered as refused.
+    expect(persistedLegs()).toEqual([]);
+
+    // The fault clears; the next run asks for everything again and reads the
+    // whole gap since the last good sync.
+    refused = new Set(WITHINGS_ADVANCED_MEASTYPES);
+    requestedTypes.length = 0;
+    requestedStartdates.length = 0;
+    const next = await syncUserMeasurements("user-1");
+    expect(next.failed).toBe(false);
+    expect(requestedTypes[0]).toEqual(expect.arrayContaining([1, 9, 10, 11]));
+    expect(createdTypes()).toEqual(
+      expect.arrayContaining(["WEIGHT", "BLOOD_PRESSURE_SYS", "PULSE"]),
+    );
+    const fromLastGood = String(
+      Math.floor(
+        (LAST_GOOD_SYNC.getTime() - WITHINGS_INCREMENTAL_OVERLAP_MS) / 1000,
+      ),
+    );
+    expect(requestedStartdates.every((s) => s === fromLastGood)).toBe(true);
+  });
+
+  it("holds the watermark when plan memory leaves nothing to request", async () => {
+    vi.mocked(prisma.withingsConnection.findUnique).mockResolvedValue(
+      connection({
+        version: 1,
+        measures: {
+          unavailable: [...WITHINGS_MEASTYPES],
+          checkedAt: new Date().toISOString(),
+        },
+      }) as never,
+    );
+
+    const result = await syncUserMeasurements("user-1");
+
+    expect(requestedTypes).toHaveLength(0);
+    expect(result).toEqual({ imported: 0, failed: true });
+    expect(prisma.withingsConnection.update).not.toHaveBeenCalled();
+    expect(recordSyncSuccess).not.toHaveBeenCalled();
+  });
+
+  it("holds the watermark when a core type was skipped from plan memory", async () => {
+    vi.mocked(prisma.withingsConnection.findUnique).mockResolvedValue(
+      connection({
+        version: 1,
+        measures: {
+          unavailable: [1, ...WITHINGS_ADVANCED_MEASTYPES],
+          checkedAt: new Date().toISOString(),
+        },
+      }) as never,
+    );
+
+    const result = await syncUserMeasurements("user-1");
+
+    expect(requestedTypes).toHaveLength(1);
+    expect(requestedTypes[0]).not.toContain(1);
+    expect(result.failed).toBe(false);
+    expect(createdTypes()).toContain("BLOOD_PRESSURE_SYS");
+    // Weight was not read in this window, so the window stays open for it.
+    expect(prisma.withingsConnection.update).not.toHaveBeenCalled();
+  });
+
+  it("still moves the watermark when only advanced types are remembered", async () => {
+    vi.mocked(prisma.withingsConnection.findUnique).mockResolvedValue(
+      connection({
+        version: 1,
+        measures: {
+          unavailable: [...WITHINGS_ADVANCED_MEASTYPES],
+          checkedAt: new Date().toISOString(),
+        },
+      }) as never,
+    );
+
+    await syncUserMeasurements("user-1");
+
+    expect(prisma.withingsConnection.update).toHaveBeenCalledWith({
+      where: { userId: "user-1" },
+      data: { lastSyncedAt: expect.any(Date) },
+    });
+  });
+});
+
+describe("shouldPersistPlanLeg", () => {
+  it("remembers a refusal only from a run where something else was accepted", () => {
+    expect(
+      shouldPersistPlanLeg({ gated: true, reprobed: false, acceptedAny: true }),
+    ).toBe(true);
+    expect(
+      shouldPersistPlanLeg({
+        gated: true,
+        reprobed: false,
+        acceptedAny: false,
+      }),
+    ).toBe(false);
+    expect(
+      shouldPersistPlanLeg({ gated: true, reprobed: true, acceptedAny: false }),
+    ).toBe(false);
+    expect(
+      shouldPersistPlanLeg({ gated: false, reprobed: true, acceptedAny: true }),
+    ).toBe(true);
+    expect(
+      shouldPersistPlanLeg({
+        gated: false,
+        reprobed: false,
+        acceptedAny: true,
+      }),
+    ).toBe(false);
   });
 });
 
@@ -423,7 +630,7 @@ describe("requestWithinPlan", () => {
     expect(second.unavailable.sort()).toEqual(["c", "f"]);
   });
 
-  it("stops at the request budget and counts what is left as unavailable", async () => {
+  it("stops at the request budget and leaves what is left unverified, not unavailable", async () => {
     const result = await requestWithinPlan({
       keys: ["a", "b", "c", "d", "e", "f", "g", "h"],
       knownGated: [],
@@ -433,7 +640,10 @@ describe("requestWithinPlan", () => {
       },
     });
     expect(result.requests).toBe(3);
-    expect(result.unavailable.sort()).toEqual([
+    // Only the requests actually made prove anything: [a..h], [a..d] and [a,b]
+    // were refused, which isolates no single key.
+    expect(result.unavailable).toEqual([]);
+    expect(result.unverified.sort()).toEqual([
       "a",
       "b",
       "c",
diff --git a/src/lib/withings/api-plan.ts b/src/lib/withings/api-plan.ts
index 50704a36e..72b99f9a5 100644
--- a/src/lib/withings/api-plan.ts
+++ b/src/lib/withings/api-plan.ts
@@ -16,7 +16,8 @@
  *     documents as advanced, then, if it is still refused, splits what is left
  *     in halves until every accepted subset has been read and every refused key
  *     is isolated. Bounded by `WITHINGS_PLAN_MAX_REQUESTS`; anything the budget
- *     could not resolve counts as unavailable until the next probe.
+ *     could not resolve is unverified, never remembered as refused, and asked
+ *     for again on the next run, which starts from what this one proved.
  *   - `WithingsApiPlanState` remembers per request family what the plan
  *     refused, so later runs skip those keys without paying a refused round
  *     trip, and re-probes them weekly in case the account's plan changes.
@@ -57,6 +58,18 @@ export const WITHINGS_ADVANCED_MEASTYPES: readonly number[] = [
   91, 155, 170, 123, 73,
 ];
 
+/**
+ * The meastypes Withings lists as free in every plan and that carry the core
+ * of the measure leg: weight (1), blood pressure (9, 10), pulse (11) and the
+ * body-composition readings the table lists as free (fat-free mass 5, fat
+ * mass 8, muscle mass 76, hydration 77, bone mass 88). A run that leaves one
+ * of them out on the strength of plan memory has not read the window for it,
+ * so the measure watermark must not move past it.
+ */
+export const WITHINGS_CORE_MEASTYPES: readonly number[] = [
+  1, 5, 8, 9, 10, 11, 76, 77, 88,
+];
+
 /**
  * Sleep-summary fields HealthLog requests that the table marks advanced: the
  * sleep score, the overnight HRV and the respiration rate. The nightly average
@@ -91,8 +104,16 @@ const PLAN_GATED_MESSAGE = /Withings\s+\w+\s+error:\s*277\b/;
 export interface WithinPlanResult<K, R> {
   /** Everything the accepted requests returned. */
   results: R[];
-  /** The requested keys the plan refused (or the budget could not clear). */
+  /**
+   * The requested keys the plan refused: isolated alone, or dropped as
+   * documented advanced after the whole request was refused.
+   */
   unavailable: K[];
+  /**
+   * The requested keys the budget ran out on. Neither read nor proven
+   * refused: not to be remembered as unavailable, and to be asked for again.
+   */
+  unverified: K[];
   /** True when at least one request was refused with 277. */
   gated: boolean;
   /** True when at least one request was accepted. */
@@ -108,8 +129,9 @@ export interface WithinPlanResult<K, R> {
  * are dropped and the rest asked for again; on a further 277 the remainder is
  * split in halves, depth first and in input order, so the same refusal always
  * spends the same requests. A single key that is still refused is unavailable.
- * When the budget runs out, the subsets not yet tried count as unavailable for
- * now; the weekly re-probe asks for them again.
+ * When the budget runs out, the subsets not yet resolved are unverified: the
+ * caller remembers only what was proven, so the next run skips that and spends
+ * its budget on the rest.
  *
  * Any error other than a 277 propagates unchanged: this only decides what the
  * plan allows, never whether the connection works.
@@ -124,6 +146,7 @@ export async function requestWithinPlan<K, R>(opts: {
   const keys = [...opts.keys];
   const results: R[] = [];
   const unavailable: K[] = [];
+  const unverified: K[] = [];
   let requests = 0;
   let gated = false;
   let acceptedAny = false;
@@ -143,10 +166,10 @@ export async function requestWithinPlan<K, R>(opts: {
   };
 
   if (keys.length === 0) {
-    return { results, unavailable, gated, acceptedAny, requests };
+    return { results, unavailable, unverified, gated, acceptedAny, requests };
   }
   if (await attempt(keys)) {
-    return { results, unavailable, gated, acceptedAny, requests };
+    return { results, unavailable, unverified, gated, acceptedAny, requests };
   }
 
   const knownGated = new Set(opts.knownGated);
@@ -155,14 +178,14 @@ export async function requestWithinPlan<K, R>(opts: {
   if (dropped.length > 0) {
     unavailable.push(...dropped);
     if (remaining.length === 0) {
-      return { results, unavailable, gated, acceptedAny, requests };
+      return { results, unavailable, unverified, gated, acceptedAny, requests };
     }
     if (requests >= budget) {
-      unavailable.push(...remaining);
-      return { results, unavailable, gated, acceptedAny, requests };
+      unverified.push(...remaining);
+      return { results, unavailable, unverified, gated, acceptedAny, requests };
     }
     if (await attempt(remaining)) {
-      return { results, unavailable, gated, acceptedAny, requests };
+      return { results, unavailable, unverified, gated, acceptedAny, requests };
     }
   }
 
@@ -170,14 +193,14 @@ export async function requestWithinPlan<K, R>(opts: {
   // part has been read and each refused key stands alone.
   if (remaining.length === 1) {
     unavailable.push(...remaining);
-    return { results, unavailable, gated, acceptedAny, requests };
+    return { results, unavailable, unverified, gated, acceptedAny, requests };
   }
   const stack: K[][] = halves(remaining).reverse();
   remaining = [];
   while (stack.length > 0) {
     const subset = stack.pop()!;
     if (requests >= budget) {
-      unavailable.push(...subset);
+      unverified.push(...subset);
       continue;
     }
     if (await attempt(subset)) continue;
@@ -188,7 +211,7 @@ export async function requestWithinPlan<K, R>(opts: {
     stack.push(...halves(subset).reverse());
   }
 
-  return { results, unavailable, gated, acceptedAny, requests };
+  return { results, unavailable, unverified, gated, acceptedAny, requests };
 }
 
 function halves<K>(list: K[]): K[][] {
@@ -274,6 +297,24 @@ export function planSkipFor<K>(
   return leg.unavailable;
 }
 
+/**
+ * The `checkedAt` to store with a run's outcome. Only a re-probe asked for the
+ * full set, so only a re-probe (or a leg with nothing remembered yet) starts
+ * the week again. A run that skipped remembered keys and found one more
+ * refusal keeps the old date: moving it would push the re-probe of the keys it
+ * never asked for further out on every such run.
+ */
+export function planCheckedAtFor<K>(
+  leg: WithingsPlanLegState<K> | undefined,
+  reprobed: boolean,
+  now: Date,
+): string {
+  if (reprobed || !leg || leg.unavailable.length === 0) {
+    return now.toISOString();
+  }
+  return leg.checkedAt;
+}
+
 /**
  * Write one leg of the plan state. A single statement merges the leg into the
  * stored object, so the measures, sleep and ECG legs (separate crons, separate
@@ -312,15 +353,23 @@ export async function persistWithingsPlanLeg(
 }
 
 /**
- * Decide whether a run's outcome is worth writing down. A run that met a 277
- * always is; so is a re-probe (the full set was asked for), whatever it found;
- * a run that skipped remembered keys and was accepted changes nothing.
+ * Decide whether a run's outcome is worth writing down.
+ *
+ * A run that met a 277 is, but only when some other request in the same run
+ * was accepted: a plan never refuses everything, so a run where every request
+ * was refused (a transient fault upstream, a misconfigured developer app)
+ * proves nothing about any single key, and remembering it would skip weight
+ * and blood pressure for a week. A re-probe that met no 277 is written down
+ * too, so a cleared refusal is forgotten. A run that skipped remembered keys
+ * and was accepted changes nothing.
  */
 export function shouldPersistPlanLeg(opts: {
   gated: boolean;
   reprobed: boolean;
+  acceptedAny: boolean;
 }): boolean {
-  return opts.gated || opts.reprobed;
+  if (opts.gated) return opts.acceptedAny;
+  return opts.reprobed;
 }
 
 // ── lifting parks an earlier build left ──────────────────────────────────────
diff --git a/src/lib/withings/sync-sleep.ts b/src/lib/withings/sync-sleep.ts
index 0f7609221..1f8719950 100644
--- a/src/lib/withings/sync-sleep.ts
+++ b/src/lib/withings/sync-sleep.ts
@@ -65,6 +65,7 @@ import {
   isPlanReprobeDue,
   parseWithingsApiPlanState,
   persistWithingsPlanLeg,
+  planCheckedAtFor,
   planSkipFor,
   requestWithinPlan,
   shouldPersistPlanLeg,
@@ -566,10 +567,16 @@ export async function syncUserSleep(
         ),
     });
     summaries = plan.results;
-    if (shouldPersistPlanLeg({ gated: plan.gated, reprobed })) {
+    if (
+      shouldPersistPlanLeg({
+        gated: plan.gated,
+        reprobed,
+        acceptedAny: plan.acceptedAny,
+      })
+    ) {
       await persistWithingsPlanLeg(userId, "sleepSummary", {
         unavailable: [...skip, ...plan.unavailable],
-        checkedAt: now.toISOString(),
+        checkedAt: planCheckedAtFor(sleepPlan, reprobed, now),
       });
     }
   } catch (err) {
diff --git a/src/lib/withings/sync.ts b/src/lib/withings/sync.ts
index 67392e7b6..10bdc24b3 100644
--- a/src/lib/withings/sync.ts
+++ b/src/lib/withings/sync.ts
@@ -18,10 +18,12 @@ import {
   isPlanReprobeDue,
   parseWithingsApiPlanState,
   persistWithingsPlanLeg,
+  planCheckedAtFor,
   planSkipFor,
   requestWithinPlan,
   shouldPersistPlanLeg,
   WITHINGS_ADVANCED_MEASTYPES,
+  WITHINGS_CORE_MEASTYPES,
   WITHINGS_PLAN_GATED_STATUS,
   type WithinPlanResult,
 } from "./api-plan";
@@ -273,11 +275,17 @@ export async function syncUserMeasurements(
     await recordWithingsSyncFailure(userId, err, WITHINGS_LEG_MEASURES);
     throw err;
   }
-  if (shouldPersistPlanLeg({ gated: plan.gated, reprobed })) {
+  if (
+    shouldPersistPlanLeg({
+      gated: plan.gated,
+      reprobed,
+      acceptedAny: plan.acceptedAny,
+    })
+  ) {
     try {
       await persistWithingsPlanLeg(userId, "measures", {
         unavailable: [...skip, ...plan.unavailable].sort((a, b) => a - b),
-        checkedAt: now.toISOString(),
+        checkedAt: planCheckedAtFor(planState.measures, reprobed, now),
       });
     } catch (err) {
       // Losing the memory only costs a refused round trip next run.
@@ -290,21 +298,33 @@ export async function syncUserMeasurements(
         name: "withings.sync.plan_gated",
         details: {
           unavailable: plan.unavailable,
+          unverified: plan.unverified,
           requests: plan.requests,
           acceptedAny: plan.acceptedAny,
         },
       },
     });
   }
-  if (plan.gated && !plan.acceptedAny) {
-    // The plan refused every type asked for. Nothing was read, so the
-    // watermark stays where it is (a later plan change re-reads the gap), and
-    // nothing failed: the connection is healthy, the plan is the limit. The
-    // settings card names what the plan withholds.
-    await recordSyncSuccess(userId, "withings", {
-      leg: WITHINGS_LEG_MEASURES,
+  if (!plan.acceptedAny) {
+    // Nothing was read: either plan memory left nothing to ask for, or every
+    // request was refused. Every plan carries weight and blood pressure, so a
+    // run where all of it was refused is a fault upstream, not a plan answer.
+    // Nothing is remembered (above), the watermark stays where it is so the
+    // next run reads the whole gap, and the run reports that it did not land.
+    // It stays off the failure ledger like every other 277: a plan answer must
+    // never climb the strike ladder or park the connection.
+    getEvent()?.addWarning(
+      requested.length === 0
+        ? "withings: plan memory left no measure type to request"
+        : "withings: every measure request was refused with 277",
+    );
+    annotate({
+      action: {
+        name: "withings.sync.plan_nothing_read",
+        details: { requested: requested.length, requests: plan.requests },
+      },
     });
-    return { imported: 0, failed: false };
+    return { imported: 0, failed: true };
   }
   const fetched = plan.results;
 
@@ -486,11 +506,27 @@ export async function syncUserMeasurements(
     return { imported, failed: true };
   }
 
-  // Update last synced timestamp
-  await prisma.withingsConnection.update({
-    where: { userId },
-    data: { lastSyncedAt: new Date() },
-  });
+  // Types the probe budget could not resolve were not read this run. Moving
+  // the watermark past them would drop their readings in this window for
+  // good, so it stays put until a run reads (or proves refused) every type.
+  // Re-reading the accepted types is idempotent.
+  // The same holds for a core type left out on the strength of plan memory:
+  // that memory may be wrong, and the re-probe must find the window intact.
+  const skippedCore = skip.filter((t) => WITHINGS_CORE_MEASTYPES.includes(t));
+  const holdWatermark = plan.unverified.length > 0 || skippedCore.length > 0;
+  if (holdWatermark) {
+    annotate({
+      action: {
+        name: "withings.sync.plan_watermark_held",
+        details: { unverified: plan.unverified, skippedCore },
+      },
+    });
+  } else {
+    await prisma.withingsConnection.update({
+      where: { userId },
+      data: { lastSyncedAt: new Date() },
+    });
+  }
 
   // Record success — even when measures.length === 0, completing the
   // round-trip is the signal "the connection is healthy". A user who
diff --git a/tests/integration/lab-source-reference-range.test.ts b/tests/integration/lab-source-reference-range.test.ts
index 57e50c028..923e72588 100644
--- a/tests/integration/lab-source-reference-range.test.ts
+++ b/tests/integration/lab-source-reference-range.test.ts
@@ -297,6 +297,81 @@ describe("a printed reference range, end to end", () => {
     expect(observations[0].valueQuantity?.unit).toBe("mg/dL");
   });
 
+  it("drops the printed text with the conversion record when the value is edited", async () => {
+    const prisma = getPrismaClient();
+    const marker = await prisma.biomarker.create({
+      data: {
+        userId: USER_ID,
+        name: "Glucose",
+        unit: "mg/dL",
+        lowerBound: 70,
+        upperBound: 100,
+      },
+    });
+    const PRINTED_MMOL = "3,9 - 5,5 mmol/l";
+    const { POST } = await import("@/app/api/labs/route");
+    const created = await POST(
+      postReq({
+        biomarkerId: marker.id,
+        value: 5.6,
+        unit: "mmol/L",
+        sourceReferenceLow: 3.9,
+        sourceReferenceHigh: 5.5,
+        sourceReferenceText: PRINTED_MMOL,
+        takenAt: "2026-07-03T08:00:00.000Z",
+      }),
+    );
+    expect(created.status).toBe(201);
+    const id = (await created.json()).data.id as string;
+
+    // The person types a new number in mg/dL, and the form echoes the old
+    // printed text back with it.
+    const { PUT } = await import("@/app/api/labs/[id]/route");
+    const edited = await PUT(
+      new NextRequest(`http://localhost/api/labs/${id}`, {
+        method: "PUT",
+        headers: { "content-type": "application/json" },
+        body: JSON.stringify({ value: 104, sourceReferenceText: PRINTED_MMOL }),
+      }),
+      { params: Promise.resolve({ id }) },
+    );
+    expect(edited.status).toBe(200);
+
+    const row = await prisma.labResult.findUniqueOrThrow({ where: { id } });
+    expect(row.sourceUnit).toBeNull();
+    expect(row.sourceValue).toBeNull();
+    expect(row.sourceReferenceText).toBeNull();
+    // The bounds were converted with the value and stay, in mg/dL.
+    expect(row.sourceReferenceLow).toBeCloseTo(3.9 * 18.0182, 6);
+    expect(row.sourceReferenceHigh).toBeCloseTo(5.5 * 18.0182, 6);
+
+    // No surface shows mmol/L text beside the mg/dL numbers.
+    const dto = await readDto("Glucose");
+    expect(dto.converted).toBe(false);
+    expect(dto.sourceReferenceText).toBeNull();
+    expect(dto.printedReferenceText).toBeNull();
+    expect(dto.referenceOrigin).toBe("source");
+    expect(dto.referenceHigh).toBeCloseTo(5.5 * 18.0182, 6);
+
+    const { loadLabResults } =
+      await import("@/lib/doctor-report/clinical-records");
+    const labs = await loadLabResults(
+      USER_ID,
+      new Date("2026-01-01T00:00:00.000Z"),
+      new Date("2026-12-31T23:59:59.000Z"),
+    );
+    expect(labs?.[0].sourceReferenceText).toBeNull();
+
+    const { labObservations } = await import("@/lib/fhir/resources/labs");
+    let seq = 0;
+    const observations = labObservations(
+      { labResults: labs } as Parameters<typeof labObservations>[0],
+      () => `obs-${++seq}`,
+    );
+    expect(observations[0].referenceRange?.[0]?.text).toBeUndefined();
+    expect(observations[0].referenceRange?.[0]?.high?.unit).toBe("mg/dL");
+  });
+
   it("keeps a window it cannot read as text and leaves the catalog in force", async () => {
     const prisma = getPrismaClient();
     await seedMarker();