A `-2` is usually linked to receiving a downvote on your question or post. After looking through your questions and answers, this is the only one with a downvote:

[![downvote][1]][2]

It looks like you found a minor bug.

  [1]: https://i.sstatic.net/ZQCx1.png
  [2]: http://superuser.com/questions/451221/is-it-possible-to-remove-the-fade-effect-between-login