Continuity mistake: When Megan meets with Teresa in the park, Megan says "It's 1981", but when Gallagher later buys a cashier's check at a bank, the date is 1980. (00:54:00 - 01:08:00)
Continuity mistake: When the protagonists get in the office to talk to his client at the beginning of the movie, he's holding the bag one way outside the door, the other way around when he walks in.
Continuity mistake: When Owen shoves the hamburger back into his father, it falls on the floor right where the father is. When the father stands up to leave the room, the hamburger is now a few feet away from where it should have originally landed.
Continuity mistake: In the scene where the robots run out of battery, the female robot stretches out her right arm and shuts down in that position. The male robot walks up and stretches out his right arm and shuts down holding hands. In between shots of holding right hands, you see them holding left hands. First right hands, then left hands, then right hands again.
Continuity mistake: 1981 film: Near the end, John Heard is riding a white horse. He has his left arm missing during the whole movie, but in one scene his right arm is missing instead as he is dashing through the woods. When he comes out of the woods it is correct again.