As Eloise wakes up at the beginning, two clocks indicate it is 6:05 am. She gets dressed, which would take a few minutes at the pace shown. She puts on his wristwatch, which is still at 6:05. This could still be explained by the watch running behind, although that would not fit the character. But then the left clock's alarm goes off and both clocks are also still at 6:05, which is impossible.
When you see the train coming, it's on the right track.
Passing the house it's on the left track.
Disappearing in the distance it's again on the right track.