Continuity mistake: After they tear her dress before the ball, Stepmother gets into Cinderella's face and points her right finger at her, but in the next shot it's her left finger pointing up at Cinderella's face.
Continuity mistake: On Riley's first day of school, she has a blue notebook on top of some other books on her desk. After her story about Minnesota, she sits down, where the notebook is now under another book.
Continuity mistake: After Thomas biffs the trucks, the position of the way they are derailed changes between shots.