@irons Yes, there are really two issues. (1) “original” doesn't mean same thing in dialog and in suffix (2) “(restored)” would be clearer.
@ClarkGoble That makes sense, but then what does “Keep Original” refer to in the dialog?
But if I click Keep Both, the file restored from the backup gets “ (original)” appended to its name.
Confused by the Time Machine restore prompt: Keep Original, Keep Both, Replace. Seems like Original is the file currently at dest path.