i know some of us have had some buggy achievements like playing 10 or 15 games, or getting a question right in every puzzle type. i remember the same happening to some in the previous game. one solution was to delete your game save on your HD. this will erase your current progression and will have to start with scratch. about to do it on mine so i can get a few easy ones that seem to be bugged.
360 GT: Saint Fu Animal Xing: Town: Anchor. Name: Spigmont. Friend Code: 4081-9425-8003