When Maddie is sitting at the table with Lenny, Lenny puts her arms behind her back and when the camera angle changes, she now has her arms folded in front of her. In the next camera change, they are behind her again.
When Richard, Ezra and Jules go to Pennsylvania to meet Maddie's parents, the various vehicles used by the characters have authentic-looking PA license plates (tags), but they are on both the front and back bumpers. PA does not use front license plates.