The member in question has currently 168* (less than 200) exemplified posts, yet they somehow has the 200 exemplary posts achievement/medal and actually receive 200 exemplary posts medal posting perk(s).
by an admin as well that according to their Modlog and
there are indeed 168 exemplified posts of all time.
Thus, more like a bug as the member never actually had 200 exemplified posts.
* Not accurate, but
less than 200 which is the main point.