New this month Character mistake: When Cartman goes to wrap the chain around the locker room door, there are two signs that read 'Boy's Locker Room', one on the wall pointing to the locker room and one on the locker room door. The sign has been written incorrectly; the word "boys" has been written with an apostrophe after the Y, spelling out the word "boy's." In this context, the word is supposed to be a plural, not a possessive, so the word "boy's" should just be "boys." If it were written as a plural possessive, the sign would read "boys'."
New this month Continuity mistake: Whilst the goth kids, vampires and Edgar Allan Poe are searching the facility to find Michael, the goth kid Pete opens a door whilst searching through a corridor to see if Michael is there and then continues walking without closing the door. A few seconds later, when they are on the security camera, the door that was left open is now closed.
Continuity mistake: In the episode "Cat Orgy" when Sheily's boyfriend, Sklar, are playing the song for Sheily while Cartman is hanging on the coat rack you can see of what looks like a picture of Cartman's grandparents hanging on the wall. But when Sheily walks over and flings Cartman up into the ceiling for arguing with her, look at the wall, the picture is completely gone.
Other mistake: When the boys cause a mini tremor by blowing up the girls' base, the time at which it occurs is strange because when they do it, both Stan's parents are at home (even though they both have jobs), Ms. Choksondik and Mr. Mackey are at Choksondik's house getting it on (indicating that school is over) and the other teachers are still at the school.