Continuity mistake: When Chase comes to talk to Zoey at the end of the episode when they are getting ready to watch the show on TV. The camera is on Chase and we see someone coming down the stairs and the camera goes to Zoey then back to Chase the same person is again coming down the stairs.
Continuity mistake: In the episode, 'Backpack', when Zoey and her friends are confronting Stacy, the shot goes to behind Stacy and Nicole says, "You're not closed." At this point, the side of the sign on the table facing Stacy is blank. Then, after Michael tells Stacy that she can't close a table, Stacy flips the triangular sign so that the side that was just facing her (the blank side) is now facing out to Zoey and her friends and has the word 'closed' on it.