When Ray, Debra and Pat talk in the kitchen about standing up to Hank, the strap of Pat's purse switches shoulders from right to left.
In the midnight hallway scene where everyone's ganging up on Robert for smoking cigarettes, the mini-lampshade on the wall sconce keeps changing from lopsided to straight, over and over again, throughout the scene.
Hank states he has to go to West Virginia to buy fireworks. Pennsylvania residents are legally allowed to purchase & set off in state Class C fireworks. In fact fireworks stores are quite common throughout the state.