Ash's drawing on the door for the shortcut to the garden isn't consistent in different shots.
After Sam says "Hear me out. I can explain. Please." some of Roy's hair is poking out from the bottom of his mask. In every other shot, his hair is fully tucked in.
When the hunter shoots the pump-action shotgun, in the beginning, he shoots three separate times, but only racks the slide once. His actions would have required at least TWO racks which does not occur.