Achievements are veryyyyy buggy

I can't believe the condition the achievements are in. everything else in the game works perfectly (except i have noticed that occasionally the graphics will mess up after an hour of playing straight to block-shaped images). I never know whether after meeting achievement criteria if i will even get the achievement or once i a while i do nothing at it is like good job completeing 500 songs after playing 1 (heard other ppl said this happens). I have gone through the "play 14 days in a row" achievement twice (even though i play EVERY day TWICE a day. I am starting to think that this was NOT worth the money I paid for it. I'm so pissed