In a long shot with a windmill, the windmill is turning, but facing away from the wind's direction as revealed by dust blowing, etc. (the wrong way).
In the bar shooting, the Preacher fired once but two people were killed. The victims were positioned where a single bullet could not have killed them both. There should have been the sound of a second shot.
Correction: They show one shot fired in the saloon, but they use two shot fired in the cut scene from the street.
Correction: They show one shot fired in the saloon, but they use two shot fired in the cut scene from the street.