The Mark of the Beast is supposed to be on the right hand but throughout the movie everyone received it on the left hand instead. How could they make such an mistake? At least they got the forehead correct.
The great announcement is at noon Eastern Time (11am Central Time) but Patty's clock (in Iowa, Central Time) shows noon.
During the chase scene towards the railway trestle the road appears one minute to have new yellow striping and the next cut having no striping. As the yellow striping don't have the old white ones underneath, the road must have been unmarked and painted during filming. The USA was converting their road markings from white to yellow during this period.