I had reached the daily 200 rep score on SO today (confirmed by the 4th upvote on a post not adding any rep.) The 5th upvote on that same post, though, added 2 additional rep. Any ideas what might have happened? Could someone have downvoted (didn't see that, though) then the upvote added 2 rep, and then the downvoter removed their vote? I've definitely gained 202 upvote rep today. Ideas?
I'm pretty sure someone downvoted me, then someone else upvoted me, and then the original downvoter removed their down vote. In any case, the recalc machine has everything straight, so I think I can consider the mystery solved. Thanks everyone for the help and information.