Continuity mistake: When Dean, his brother Eric and Bailey are taken back to the house. Dean and Eric are taken away and tied up. As Sheriff Hoyt is threatening them we see Eric's face has blood on it. As the scene keeps going, the blood on Eric's face keeps disappearing and reappearing each time we see him.
Continuity mistake: The blood on Bailey's face disappears and reappears while Luda Mae is washing it.
Continuity mistake: When the dead biker is loaded into the squad car her head's leaning back, mouth open. A shot later and suddenly her head's turned to the right, mouth closed.