The driver and shotgun rider of the stage arriving at night know the two station keepers well and while they comment on Edgar Buchanan's absence none of them comments on the fact that Tyrone Powers "wife and daughter" are absent.
Shortly after the night stage leaves Hugh Marlowe is sitting at the dinner table reviewing a sketch that depicts that station's layout. Tyrone Power knocks on his door to get Marlowe's attention so he can get "drinking water". When Marlowe rises to unlock the door the sketch is missing and is not seen again.
When Hugh Marlowe first rides up to the station he is met by Tyrone Power while Edgar Buchanan hides in the tack shed with a rifle pointed in Marlowe's direction. After Tyrone Power tells Buchanan that it's safe to come out he leave the shed without the rifle. Later when Buchanan makes a failed dash to retrieve the rifle it is propped up at the entrance of the tack shed but it was not placed there when Buchanan exited the shed earlier.
At around 68 minutes in, Tom is looking through a hole in a wall when, for dramatic effect, the shadow of a person outside falls on the wall. In the next shot, the shadow of the person outside falls in a completely different direction.
During the shootout between Tom and Tevis, many more shots were fired from the three guns (Tom-1 and Tevis-2) than bullets (18). Neither reloaded during the sequence.
The gang assumes Vinnie is Owens' wife, yet none of them ever notice that neither "Mrs. Owens" or her "husband" is wearing a wedding ring nor ask why they don't have rings.
Owens and the stagecoach masters and passengers should have been immediately suspicious of Zimmerman, as he keeps his "U.S. Marshal badge" in his pocket. Law enforcement officers at the time were required to wear their badges in view.