I figured out what was going on... the backend started using a different (more stable API) for Google+ numbers, but for whstever reason it caps at 10,000. So now if the number is exactly 10,000 it will fall back to the other API that is less stable, but more accurate). Also, just noticed the buttons jump around when you hover over them in some unique cases like on your site so that should be fixed now too.
Hmmm... it's very difficult to debug without access to a machine that is doing it for me. lol I made a couple changes to see if that fixes it... can you test it for me now?