Plot hole: There is no way that Zoey could've seen those boys hanging Chase's bike from a tree. She was way far from the window to even recognize his bike, and when Chase looks through the window, the bike was just now being lifted from the ground.
Other mistake: When Stacy sees Zoey's designed backpacks for the first time, she uses her camera to take pictures of them. In one shot, a close up of the camera display is shown and the message "CF card full" is on the display and yet the camera still makes "click" sounds as Stacy seems to take pictures. (00:10:22)
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.
Continuity mistake: When Nicole gets the disc in, it falls into the "basket." Chase says that it took her 48 shots to get it in, then the shot changes and you can see all that discs are on the ground, but the blue disc that Nicole threw is gone.
Answer: Dustin was only considered a main character from season 1-3, and probably just because he's Zoey's brother. Dana was only a main character for season 1 and James didn't become a main character until season 4.
Bishop73