Other mistake: When Sam is going through Creasy's resume in the back of the Mercedes, the resume speaks of a "Mr. Rosche", not Creasy. (00:09:40)
Other mistake: In the cemetery all of the headstones are blank except for Ryer. (01:26:25)
Other mistake: When Creasy is coaching Pita in the home swimming pool he calls her by his name, Creasy, not Pita.
Other mistake: When Creasy thumbs through Pita's journal (which, unusual for American English, is addressed by her as "Dear Diary"), you can catch a glimpse on her first entry, made on a page titled "January 1", but reading "Today at school I had a great time." So, if she's alleged to be keeping her diary true-to-date, she's describing a school day on New Year's Day. Also, her handwriting changes considerably within the next three months (cf. April entry) - but then suddenly changes back in June.