When Scott attacks the first home invader, there is a very obvious editing/continuity mistake as he strikes the invader with the bat.
After Scott kills the intruders and his brother arrives to find them, in between shots Scott has his fingers against the side of his, then his hands are nowhere near his head.
When Scotty confronts Toby's abusive stepfather, his hands change position depending on whether the shot is shown from the front or back. From the back, Scotty's middle finger is in the man's ear, but from the front, Scotty's middle finger is behind the man's ear.
The dartboard is hung too low to be used properly.
When James gets into his pickup in front of the church, one can clearly hear what sounds like a set of keys falling to the ground as he sits in the truck. The item(s) is never retrieved, but he also is not shown leaving in the truck.
After the murder of the two men, Thom and Margaret are discussing it in the kitchen with bright sunshine coming in through the window over the sink. Yet one sees her head's shadow on the cabinet, illuminated for the shot. This same effect reoccurs after Margaret , with the gun, stops Scott from beating up Thom.