When the group is deciding whether or not to go on to Lordsburg from Apache Wells, The Marshal's Stampede string on his hat changes sides. The angled support beam on the door behind him changes directions as well. The film was obviously printed in reverse for one part of the scene.
Early in the trip the coach driver and the sheriff take turns with the reins long enough for each to remove his coat. The sun is getting brighter and the idea is conveyed that it is getting warmer. Then, there is a scene, maybe when they pick up Ringo, when their coats are on their bodies again. However, immediately after that their coats are once more off.