I accidentally found new blooper (if someone else didn't put it) with The Fox. It's in the beginning when train passes by. I accidentally pressed stop button and saw that guy who has replaced Fox later in the movie. I don't know why he was there.
I would say that they had filming the scene after all other scenes, maybe they've wanted to leave it in the end.
After all, everybody knows what happened with Thomas G. Waites, so they've probably wanted to shoot the scene with that guy.
Few minutes later after that scene you can see Fox (Thomas G. Waites) standing near Cochise. But anyway I don't get it... That's why we haven't seen him in intro talking with other Warriors.