A/ You havent bashed or bent anything on the machine.
B/ The bearings do NOT squeeze the teeth when you push the blade back as far as it will go (top and bottom set).
C/ You havent cut a thousand circles going all in one direction.
D/ You havent got lazy and are trying to push the wood into the blade too fast.
If you've got another blade on hand, try it first. Suspect damage to the tooth set as others, or just dullness causing thrust on the blade and thus shoving the front to the side as the pressure is too much to get into the cut without strain.