Other mistake: When Anne goes in for her second day of teaching and there's the illustration on the board, you see a view of the girls and an empty seat in front of Emiline. When the camera goes back, there is Jen Pringle sitting in it, and it happens again where Jen is sitting in the seat. A moment later, Jen walks into the classroom late and sits in the 'vacant' seat right in front of Emiline.
Other mistake: The same front shot of Superman flying is used over and over and over again.
Other mistake: Before the Chipmunks and Chipettes begin their hot air balloon race, Klaus goes through the rules explaining that each team will be given the opposing team's doll when they reach various destinations across the globe. He then walks over to the Chipettes and hands Jeannette a trunk full of Chipmunk dolls - but they're not supposed to receive any Chipmunk dolls until the race is in progress. (00:14:35)
Other mistake: Just before the first arm wrestling match against "Smasher, " Bull Hurley is seen in the doorway looking at Lincoln accept a match. A few seconds later Bull seems to appear into the doorway like he is showing himself for the first time.
Other mistake: In the scene at the lake, Stennis gets down and throws Moose, who can't swim, into the water. Then he gets back up on the guard tower. Then the "Last Chance Boys" push Stennis and the tower into the water. There is a close up shot of the tower's foot. It is about a quarter of an inch from falling off the dock. If it had been in that precarious of a position, then the man's movements and getting down and back up into the seat would have made the tower fall in before it was pushed.