what is up with smart balance?

so I've been rating a lot of games. edit: and commenting I was at -15 and at least I rated 10 games.

the balance was frozen so I thought it will move when it moves.

then this one guy comments at my game and it became -16 :cry:

maybe this has been asked before but can someone explain? this is how it looks like

smartBalance.png

should I just stop rating games?