Continuity mistake: As the girls ride in to town to avenge Kim, there is a deputy in a faded red shirt on a second-floor balcony. The first time he gets shot, he does a flip onto the street. The second time he gets shot, he goes over backwards.
Continuity mistake: When Maria throws down on the sheriff in the stable, she fires her Winchester and levers another shell into the chamber. She verbally threatens the sheriff again, and once again jacks another shell into the firing chamber.