In the beginning, when the photos in the yearbook are shown, the names and photos in the top row do not match each other: there are four names but five photos. Also, there is one male name, but photos of two males.
Nearing the halfway point, when Irene is thumbing through her mother's yearbook, there is a page that reads, in part, "Cheerleading is for the pretty, and the popular." A school yearbook would never say that, since it would be considered too exclusionary. Unless, of course, it was Florida.