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