Other mistake: Stifler, Finch, Oz and Jim all have radios. Stifler says during the lesbian scene that they are getting naked. This should have been heard on Jim's radio (he is under the bed), but it is not. We never see Jim turn his radio off as his hands are in shot. (00:43:20)
Suggested correction: It's a bit of a stretch, but maybe Jim had the wherewithal to turn it off (on or offscreen) simply as his radio is most likely to be overheard by the girls themselves, as he Is under their bed (or it malfunctioned somehow, was damaged in the course of all that scrambling about).
Factual error: The end credits to the movie, which features the Harvey Danger song "Flagpole Sitta" (1997), incorrectly credits it as "I'm Not Sick But I'm Not Well" by LIT. No such song exists, nor have LIT or any other group ever officially recorded covers of "Flagpole Sitta."
Suggested correction: Please indicate which version you saw this on (and possible screenshot). All the versions I've seen, including IMDB, don't even list this song (or it's incorrect title) in the credits. LIT is only credited for 2 songs; "Last Time Again" and "Place in the Sun" for "American Pie 2." The song "Flagpole Sitta" by Harvey Danger does appear in the first "American Pie" film, however the credits I've seen, including IMDB, gives the correct title and correct performed by credit.
