Yep, it doesn't accord with the healing abilities on display in T1 and T2. In T1, when the Terminator suffered injuries to his biological elements, it was clear that it could not heal that extensively. Rather, as commented on by its neighbour in the motel, the flesh was decaying and rotting and gave off a horrible stench. Its healing capabilities were largely similar to that of a normal human being, ie. gunshot wounds closing and healing after appropriate medical treatment, but not able to grow back missing or seriously injuried body parts.