In a very distant past (before the closing overhaul), I vaguely remember that if I cast a recommend closure flag on a question, it would show in my personal flag history as "off-topic; belongs on [site]". (Update: After a bit of clicking, I found another post which contains a screenshot of how such flags used to look like.)
However, after the 2013 four-part overhaul of the close reasons, those flags just show up as "off-topic" (today "Not suitable for this site"), with the display of prior flags retroactively changed to that.
Why was that change made?