As seen from inside the stage, as it pulls out of the town with Kitty, Newly and Savrin, the speed of the projected view of people and buildings through the windows is not consistent with the apparent speed of the stage.
Matt tells Newly that he and Festus will come to the mine on foot so they won't be seen, and will show up the next day. After Newly is back at the mine, working on Manez's brother, there's a scene change showing Matt and Festus riding to the mine. A short time later, they arrive. They didn't walk any distance at all.
While serving as a spotter above the mine, Festus is shot in the right shoulder. When coming down the hill afterwards, he's holding his left shoulder. Afterwards back at the Long Branch, his right arm is in a sling.
Manez has Newly kidnapped to take care of Manez's seriously wounded brother. After Newly and Kitty are in with the wounded man for just a few minutes, they are forced to leave him alone to go eat with Manez and his men.