After winning my last game, my rating went up to 1339. But during the night, for some reason my rating went up another 10 points (to 1349), without me playing/finishing another game. Was that a bug? I am not sure why I gained those extra 10 points.
One of the opponents you lost to recently had their account closed for Fair Play Violations and you received a rating refund. I believe messages or notifications are normally sent if that happens.