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.
Continuity mistake: In season 2 episode 5, Zoey, Chase, Dustin and Nicole are eating lunch. Trisha joins them later on, and sticks gum to Dustins' drink. The gum changes sizes and moves between shots.
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.
Revealing mistake: Logan gets all the characters to spend spring break at his dad's house. When Zoey finds out Dustin drank all of Quinn's "fratz" she screams his name and runs to go and find him, but despite being meant to be angry you can tell she's laughing.
Continuity mistake: Chase gives Zoey a radio in this episode, but in 1-3 Webcam, when Zoey, Quinn and Nicole are in Zoey's room trying to figure out who is telling the girls' secrets to people, you can see that radio above Zoey's head.
Alone at PCA - S4-E3
Continuity mistake: Stacy is sitting on the curb waiting for her parents to show up. When the guy with the blower came by and swept the leaves on her, it showed no sign of her when he walked by. Just her luggage.
Continuity mistake: When Zoey is about to get down off the horse, she is at first straddling the horse, then instantly has both legs hanging down on one side.
Walk-A-Thon - S4-E7
Continuity mistake: When Michael and James are discussing the word bicycle, the length of the straw sticking out from Michael's drink changes drastically between close ups and long shots.
Walk-A-Thon - S4-E7
Continuity mistake: When Michael discovers Logan and Quinn together, the book on Quinn's lap closes itself instantly between shots.
Walk-A-Thon - S4-E7
Continuity mistake: In the opening scene, when Lola is knitting, the wool constantly changes back and forth from being on the needle to off, and from being tangled to tidy.
Walk-A-Thon - S4-E7
Continuity mistake: When Quinn and Logan are asking Michael if he knows about their relationship, Quinn's hair jumps from behind to in front of her shoulder in an instant.