This post have been downvoted according to my reputation tab. However, when I go directly to that post and try to expand votes, there's no dowvnote and two upvotes. Oh, now I noticed it says that I've been both upvoted and downvoted at the same second.
We all know that 10 + 20 - 2 = 28, but reputation tab says it's 30, which would be okay, without the downvote.
/reputation page, I don't see any downvote. Reputation tab seems to be only point on Stack Overflow which thinks that I've been downvoted.
How is this possible?