On the scene where Tyler injects Brigitte for the first time at the mental hospital, the content of the syringe varies from 1/3 to almost 1/2 full.
The blood on the closet door appears and disappears when Ginger is trying to get out.
Ghost fires 3 shots from a double-barrel rifle that only holds 2 bullets. Alice then reloads takes the gun from her and reloads it, despite having just walked in the door and not having any ammunition.