When the wounded Wade Cooper passes out and falls face first into the stream after seeing Nancy Mailer bathing in it, he is lying with his face underwater and the broken arrow shaft is still protruding from the back of his right shoulder. When she goes to him seconds later and pulls him out of the water, he is lying mostly on the bank and his face is no longer under water, though he is still unconscious, and the arrow is missing. Later, when she arrives with him back at her camp, the arrow is back in his shoulder.
When Wade takes the Indian back to his tribe and the chief tells him that he's out of the tribe he mounts his horse and rides away glaring back at Wade. Wade is shown looking grimly at him as he rides off but the horse that the Indian got on is standing right behind him. It again shows the Indian riding off and then back to Wade and the Indian's horse is now gone.
When Wade takes the Indian back to his tribe and throws him off his pony at the chief's feet, the Indian's hands are untied. But seconds later as he gets back to his feet, there is a loop of rawhide (not even enough to keep his hands tied together) around his wrists.
A scene with the Indians bunched together on a hillside and the chief raises his spear and they all turn around and come back down, with a couple Indians laying dead on the ground in front of and behind them, is shown twice, once at the beginning of the movie when the ambush happens, and once at the end when the cavalry is chasing them.