It seems like this shouldn't be able to happen:
Three people flagged a post as "not an answer", but then another user cleaned up the post's formatting, and all the flags got dismissed without anybody actually looking at them. It took weeks for somebody else to flag the post for the fourth time so a mod could actually act on it.
Theoretically the user who edited the post shouldn't have, since it was clearly headed toward deletion, but that shouldn't matter; the flags should stay around until a mod has actually reviewed them.