When Juan Esparza and Joe are talking to each other in the jail cell, the man in the cell behind alternates between sleeping and sitting up on the bed, without enough time in between shots for him to move into those positions.
After Mannix crashes through the fence gate to escape from being crushed between two front loaders, the only damage to his car is the inner left headlight, which had been removed. But there was no damage to any other part of the car. There should have been visible damage around the headlight frame, and possibly other portions of the front of the car.