During a scene riding in a Crown Victoria in the woods, the car has Maryland or BC plates (look similar), it goes around a curve, same car California plates.
When getting hair for the DNA test, Rachelle takes hair from a razor. You cannot use hair for a DNA test unless it still has the skin attached to the bottom, which hair from a razor would not have.
A certified copy of your birth certificate is needed to apply to college and to get a driver's license. Also, being over the age of 18 a copy would be needed for many things as an adult.
Before Elsa escapes from the bathroom in the trailer park, the Crown Victoria car has BC licence plates - as it pulls up to the laundromat, the license plates change to California.
The character Joe Drescott is incorrectly listed in the credits as "Joe Prescott."
When David is shot, flames are visible from the squib in his arm.
In the opening scene, the "father" is reading a newspaper from Tukwilla, Washington. The license plates seen on all the cars are not from the state of Washington.