Both dialogs offer three sort keys and let you pick the type; only the
first key was offered, and the type was always the detected one. A later
key decides only where the ones before tie, and the sort stays stable.
Alphanumeric is the plain collation ("10" before "2") — that is what
choosing it over the detected type is for, so the two collators differ in
`numeric`. Sorted numerically, a cell that is no number sorts last either
way, as an empty cell does in a spreadsheet.
Steffen Becker
dab1d662c9