Finally swallowed my pride and went to my LBS to see what the problem was. Turns out nothing is wrong with the derailer, they gave me the wrong size bottom bracket. So because they screwed up the mechanic gave me a $90 XTR bottom bracket in exchange for the $35 one that they had given me the day before. So needless to say I'm happy, the bike works awesome now, I tweaked my brakes and rear derailer into adjustment so now it's ready to role with pretty much an entirely new drivetrain. Anyway, Thanks to everyone for all the helpful advice.