There are bigger problems with the new DLC. My game literally doesn't work because apparently it was programmed by drunken chimpanzees.
lol lol

have you tried deleting then downloading again? may do the trick.
im on 360 too and when i bought SR on release date my game was buggy as hell, almost to the point of unplayable, but cos it didnt happen to other people on the forum they dismissed it as 'not an issue' until it happened to them (and came crying onto the forum asking for help)
try the deleting then re-downloading trick bud