Corrected entry: The end of the movie should take place at night. In fact, when Tommy leads the band kids out of the gym, the light fixtures on the wall behind him are on. The camera angle cuts to a wide shot and suddenly its daylight and the light fixtures are turned off.
Corrected entry: In the beginning Harold asks for a wagon on Sunday at the livery stable. But later when he is asked if he wants to go to the hotel he says he is not sure if he is going to stay. Now why would he need a wagon on Sunday if he won't be there?
Corrected entry: In the scene where the train pulls into River City, the station and platform are on the right. (This means that if we were watching from the platform, the train would approach from the left.) Professor Harold Hill leaves the train and we now watch the action from over his shoulder, on the platform. The trains pulls out going to the left, the same direction it came from.
Corrected entry: Why does it take the anvil salesman nearly the entire movie to catch the next train back to River City? The train takes only a few minutes to go between stops, but he doesn't show up until after Harold orders all the instruments which would take weeks, if not months.
Corrected entry: A little before "76 Trombones" Mayor Shinn says that a firework spectacle will take place later that evening, if the rain stops. During "76 Trombones", everyone marches outside and it's not raining.