Other mistake: Hannah Montana and Kyle (Lucas Cruikshank) are recording voices for an animated cartoon. The studio door is left open.
Other mistake: Near the beginning the dividing line in the bathroom has Henry on the right and Peter on the left but as you can see Henry would be on the left due to where his room is and where he would have to walk.
In Too Deep - S1-E23
Other mistake: When Miriam tells Zane she will give him the necklace for a kiss, she said "I will give it to you." But then when she throws the necklace in the water, she said "I didn't say I would give it to you."