Upvotes/downvotes for your own posts do wonky things
I can't really figure out the pattern of it...
By default, your own post is at +1 (assumption that you vote for your own post). If you click upvote, it removes your own +1, making it a 0. If you click downvote (with it either at +1 or 0), it goes to -1. But sometimes it seemed to get stuck and would flicker. It would show -1, but then jump right back to +1 for a few clicks in a row. Or vice-versa.
Not sure if this is happening on posts made by other people. I haven't seen that yet. But it would also make sense to just disable voting on your own posts completely.