Character mistake: When Schaeffer, McFee, and Fergie walk down the dusty road to Amish village, Western gunslinger style, they make a silly mistake no cop would make - they assume that Amish villages are unarmed and undefended. No so. The Amish have no prohibition on guns and almost every house would have at least one hunting rifle or shotgun. The three bad guys are risking being shot to bits before they get halfway down that hill; they don't even make an attempt at concealment. (Wouldn't they also at least think John - a police officer - would still have his gun or might have got hold of a firearm from the Amish?)
Character mistake: After the dance when Monique and Lane meet for the first time, Lane says to Monique, "Hi, you're that French kid staying with the Dorkheads...uh...Smiths next door." But the Smiths live across the street, not next door, as evidenced by several scenes in the movie (i.e. Monique looking out her window upon arrival, Monique throwing fruit at the street sign, etc.). (00:47:40)