I sorted a list with ~10k lines, with [delete duplicate lines] set.
It sorted the file OK and correctly reduced the file to ~8.5k lines.
but
The message in the bottom left of the window reported "Deleted 1 lines".
Repeatable with different sort options re case etc.
Bug (v9.8.2) sort delete count
Moderators: AmigoJack, bbadmin, helios, Bob Hansen, MudGuard
Re: Bug (v9.8.2) sort delete count
This is on the list of bug fixes for the next release.