Sarah is wearing different boots from when she gets out of her car to when she climbs the ladder to Dale's roof.
Earrings are not authorized for wear by male U.S. Army personnel while in uniform.
In a view of the clock tower after John and Sarah start working together, one face shows a time of about 5:46 and the other shows approximately 10:59.
A portrait of Queen Victoria hangs on the wall outside the judge's office, the court building has "VR" on it for "Victoria Regina" (Queen Victoria), and on the judge's office wall is a picture of Queen Victoria's Jubilee celebration in Westminster Abbey. This makes sense for the small town in Ontario, Canada, where the movie was filmed, but not for the movie, which is set in small-town USA.
When John and Sarah are sitting on the floor amid the law books, she is reading "2014 Martins Annual Criminal Code" which is a Canadian law book. The story takes place in a small U.S. town, so she should be studying U.S. laws.