The Apache attack at the ruins starts with 9 or 10 Indians on horseback, it changes with different shots. Randolph and his party shoot and drop at least 5 of the attackers and yet 7 ride away when they give up.
During the shootout with the Indians at the Adobe Corral ruins, Ben Brigade fires 7 shots from his 6-shot Colt revolver before he is shown reloading.
At 44:30 into the film Karen Steele can be seen clearly using and holding a brown plastic comb.
At 48:10 Truck tracks are clearly seen on trail/road they are traveling and again at 69:05 truck tracks leading up to the hanging tree are visible.
At the film's end, the burning tree is not burning naturally; it has been doused with a flammable liquid.
Karen Steele's hair and blouse reflect the 1950's and not the depicted era.
Bra straps are seen through Mrs Lane's shirt when Brigade tries to negotiate with the Indian, and in a later scene at the abandoned corrals.
Brigade insists on bringing his prisoner to Santa Cruz, Arizona. The county of Santa Cruz was created in 1899. The film is set in an earlier time. For instance, the Apaches are on the warpath and the last major outbreak of the Apaches was in 1890.
At the start of the movie Ben Brigade is surrounded by three gun-toting bad guys, unknown to him. They could have just shot him rather than letting him take their friend and then spending the rest of the movie chasing him.