In the credits William Desmond is listed as John Mills, but in several instances he is called Bill by others.
At the end of Chapter 4 there is a bad edit. The stuntman dressed as Bill Cody jumps from his horse to a horse pulling a wagon. The horse pulling the wagon collapses and falls to the ground. Surely hurting the horse and stuntman. But this is left in the film. In the beginning of Chapter 5 this scene is played out differently without the falling horse.
Fist fights and skirmishes have dubbed-in grunts, groans, and gibberish that doesn't match the people involved.