Today I received the maximum amount of points possible on StackOverflow - 199 (?).
I answered questions and got 21 up votes 1 down vote and down-voted one answer.
I know it sounds a bit picky but why didn't I receive 200 points (and a badge)?
You only recieved 199 points because you downvoted once (bringing your rep down 1 point).
You have still hit the cap and you'll recieve your