Continuity mistake: At the fort shoot out, Hank shoots at a S.W.A.T. vehicle and hits the driver. Two bullet holes are shown on the windshield. The very next shot shows the vehicle begin to crash, and the bullet holes are gone. (01:15:40)
Continuity mistake: When Earl and Nash are fighting over the cliff, Nash tries to smash Earl's head by throwing a large concrete block at him. It sits there afterwards. You never see this block again in the spot they were fighting, not even when Hank drops the crane hook on the slab and launches Nash off it. The block should have been seen flying also. (01:18:45)
Continuity mistake: This happens twice that I can remember in the movie, the first time in the P.T.A, when Martin crashes through the house in his car, when he lands the hubcaps fly off the car, this is very visable, but when we see the car just a few seconds later, the hubcaps are back on the car. This exact thing happens again when Martin and Steve crash through the sign at the junkyard.
Factual error: When Hank is let out of solitary confinement, he punches the guard. A prisoner would never have the chance to attack guards while in solitary confinement because he/she is cuffed while still in the cell. Also, there are always at least two guards for escort, not one.
Answer: He was thrown in the solitary confinement for another 3 months, which makes it 9 months in prison.