Continuity mistake: When Charles and Moira are washing the car, Charles throws a bucket of water over the bonnet, soaking Moira, who is crouched down the other side of the car. In the first shot the water hits Moira, the angle changes and the water hasn't yet hit her.
Continuity mistake: Ben kicks the tractor when he can't get it started, denting the grille, the next time we see the tractor the grille is straight.