Pool Party (aka Pilot) - S1-E4
Continuity mistake: When Kate is walking down the hallway towards Miranda and Lizzie, her bag strap lies perfectly diagonal against her chest. Yet in the next shot it hangs more vertically, at her side, then back to diagonally. (00:09:50)
Random Acts of Miranda - S1-E14
Continuity mistake: When Miranda storms out of the cafeteria and Lizzie calls her a stinkbag actress, Gordo is sitting down with a plate of food. In the wide shot he has the spoon lowered down but in the close up it is held up right by his mouth. (00:37:45)
Night of the Day of the Dead - S1-E24
Continuity mistake: After Matt tells Lizzie, Miranda and Gordo that he ate the Day of the Dead food offering, he puts it down on the side as they continue talking. The food is sitting on top of an orange napkin, but in the next shot the napkin is empty and the food is gone. The food then reappears in the napkin again. (01:19:20)
Continuity mistake: Lizzie and Miranda enter the park area to find Gordo. As they walk in, between shots Lizzie's purple scarf keeps on moving back and forth from hanging down normally to resting on her shoulder. (00:14:00)
Continuity mistake: When Lizzie enters Gordo's bedroom, her turquoise earrings that match her outfit are missing. Then they are back on suddenly, as Gordo begins to talk to her about his new hobby in world war planes. Then halfway during their conversation, her earrings vanish again. (00:09:55)
Continuity mistake: After Gordo's science project model brain explodes, it sprays "brain goo" everywhere. The continuity of the amount of goo on everyone, and the position of the goops of it on them, continues to changes through the scenes. Eg., Lizzie's face gets completely covered yet when she goes out into the school hallway, her face is almost clean. (02:09:00)
Continuity mistake: When Matt askes his dad to pass the basket of garlic bread over, as Matt puts the basket down on the table, the end slice of bread falls out of the basket. But in the next shot the whole loaf is inside again. Also the position of the basket changes. (02:13:30)
Night of the Day of the Dead - S1-E24
Continuity mistake: When Mr. and Mrs. Sanchez are dropping off the Day of the Dead ornaments to the Fright Night party, Mr. Sanchez hands Kate a fake rubber hand and she takes it with her right hand. In the next shot she is holding it in her left. (01:01:35)
Night of the Day of the Dead - S1-E24
Continuity mistake: Matt and Lanny are sitting at the table, marking on their map where to visit for Halloween. Lizzie then comes in and starts an insult throwback. Between shots the marker pens lying on the map swap their placements. (01:08:05)
Continuity mistake: In the opening scene, as Miranda and Lizzie walk over to Gordo, who is sitting on the table in ratpack clothes, Lizzie goes to sit down. But in the next shot her and Miranda are both standing again and Lizzie then sits down once again. (00:00:10)
Night of the Day of the Dead - S1-E24
Continuity mistake: Lizzie pulls the rubber eyeball out of the glass of mud she is holding, to prove that the mud is actually the remains of Matt, who was turned into mud for upsetting the spirits. As she pulls the eyeball out, between shots the way she is holding it changes. (01:21:30)
Lizzie and Kate's Big Adventure (aka Lizzie and Kate's Excellent Adventure) - S1-E28
Continuity mistake: When Matt ran into Kate, and there was a close up of Matt, in the background, Kate's arms were crossed, but in the next shot, they were by her sides.
Continuity mistake: When Lizzie, Miranda and Gordo are in the Digital Bean, Gordo brings Lizzie a bottle of apple juice over. Then during the scene in wide shots the bottle is not visible (although it could be on the part of table not visible) - yet at the end of the scene, between shots, the bottle suddenly appears right in the middle of the table. (00:35:45)
The Untitled Stan Jansen Project - S1-E22
Continuity mistake: When Lizzie was studying after her fight with Gordo and Miranda, she started to sharpen her pencil, but in the next shot, the pencil sharpener disappeared, and a rubber on the end of the pencil appeared and disappeared.
Continuity mistake: At the beginning of the episode when Kate is inviting Lizzie, Gordo, and Miranda to her party and they read the invitation it says she is turning 14 but in Season 1 Episode 30 Gordo's Video, in Gordos video Kate tells Claire she's already 14.
Suggested correction: Kate soon turning 14 is a running gag in the show. She is canonically hiding her real age, so it makes sense that she lied about her birthday party and only confessed to her best friend about her real age. This running gag becomes more clear when Mrs. McGuire asks how old Kate is turning, to which she replies with "14" and Mrs. McGuire starts chuckling and says "sure."
Misadventures in Babysitting - S1-E8
Continuity mistake: When Matt is shown eating a popsicle really fastly, he finishes and shows his nice clean popsicle stick, and his mouth is relatively clean. Yet a few shots later his mouth is covered in purple mess. (00:18:55)
Continuity mistake: After the aptitude test, when Gordo, Lizzie and Miranda exit the classroom and walk down the hallway talking, as they progress, the binder and book that Miranda's holding keep on switching positions between shots, and they also change from showing their front/back alternatively. (01:55:05)
Continuity mistake: When Lizzie, Gordo and Miranda sit in class as receive their aptitude tests, we see Miranda's hand under the desk, holding a pencil. Then she informs the others that she feels gum under the desk, only her hand is now empty. She then has a pencil in it once again in the next shot. (01:53:15)
Continuity mistake: During gym class, Miranda is asked to demonstrate her rhythmic gymnastic skills, which ends up in her accidentally tossing them halfway across the field. When she returns next to Lizzie, she has one baton, then two, then one again, between shots. (01:11:50)