Other mistake: In the last scene where the children are walking away from the house after their father has gone in, in the background on the right hand side of the screen, a tree falls.
Other mistake: We see the old gentleman travelling this route several times during the course of the film. However he is always going the same direction! Does he teleport the return leg? We know this is a two way line as trains are seen going the other way, including the train father returns on.