Continuity mistake: Right after Wendy is told to stop praying during the Hoods' Thanksgiving dinner, Elena picks up a plate of beets and serves herself one. Ben passes the rolls to Paul at which point Elena repeats the same thing (her plate is empty again). (00:45:10)
Continuity mistake: When Paul gets off the train at the beginning of the film, the man who walks in front of him nearly slips on the ice. When the scene is flashbacked at the end of the film he walks safely.
Continuity mistake: Time of day in the last shot is incorrect. When the Carvers greet Paul getting off the train it is very bright late morning or noon at the latest. When the camera shows them walking toward their car the lighting has changed dramatically and you can see it is the late, late afternoon due to the dark orange hues.