Revealing mistake: During Lizzie's rhythmic gymnastic routine, in some shots where she is performing flips and other complicated dancing moves, you can quite clearly see that a stunt double is doing them instead. (01:25:00)
Visible crew/equipment: When Lizzie is talking about her gymnastic talent in the kitchen, Matt tells Lizzie that he has six talents. He then begins to list them. As he does, you can see the boom microphone dip down in the screen, directly above him. (01:17:00)
Audio problem: When Coach Kelly asks Lizzie to stay behind in the locker rooms to talk, she begins to say "In all my years of teaching...", however in the shot you can clearly see that her mouth is mismatched to this line and is saying something different. (01:14:25)
Continuity mistake: During gym class, Miranda is asked to demonstrate her rhythmic gymnastic skills, which ends up in her accidentally tossing them halfway across the field. When she returns next to Lizzie, she has one baton, then two, then one again, between shots. (01:11:50)
Continuity mistake: Kate's surname keeps changing from being Sanders to Saunders throughout the earlier episodes. In this episode, near the end Lizzie pronounces her name "Saunders" yet it is spelled Sanders in the credits. (01:28:30)