When you upvote or downvote someone with a comment, if you reverse your vote it doesn't reverse the score you gave them.
In my case, I accidentally upvoted someone because I hovered the downvote button and then I [must have] passed over the upvote button when I when I moved the mouse to select the text box. I then accidentally awarded 11 rep to someone who should have been down-repped.
I reversed the vote, refreshed the page and then downvoted. Unfortunately, this didn't reverse the upvote score I accidentally awarded them. It did apply my downvote rep subtraction, but this person now has 9 points more than they should have.
Is this a bug or intentional?
Thread in question: Click Me