Continuity mistake: When one of the older twins in the wheelchair throws the apple and his twin catches it, we see that nobody is standing on the stairs in front of the main entrance. Though in the previous and following shots Moseby is actually standing on the second step.
Free Tippy - S2-E5
Continuity mistake: When Carey hands Cody and Zack the pet rocks, her handbag goes from her shoulder to her arm, back up to her shoulder between shots.
Volley Dad - S2-E24
Continuity mistake: Towards the end (during the closing credits) when London comes and find Maddie sleeping on the bench, they talk for a while and you can see Maddie has her bag beside her but when they leave the bag is still on the bench.
Continuity mistake: When Zack trips on the slick floor, his red backpack ends up behind Cody, but in shots facing the kitchen the backpack is across the room, near the kitchen cart.
French 101 - S2-E2
Continuity mistake: In their attempt to make Esteban feel better, when London stands at the doorway shouting at Maddie outside, the colorful shopping bags on London's arm change their order in the close-up.
Continuity mistake: Season 1, episode 9 'Band in Boston': When Cody and Zack are arguing over Zack's look (vs Cody's lyrics), the black cord (with whistle) goes from under Cody's shirt collar, to over, back to under, between shots.
Answer: The show never says.
Brad ★