When riding Dynamite, the competitors are obvious 'stunt doubles'. Cheyenne has two 'stunt doubles' - only one wears a hat (the hat is lighter in colour and of a different style to Cheyenne's dark hat), neither wears a vest whereas Cheyenne does, both have numbers on their backs whereas Cheyenne does not. Weston's 'stunt double' has a hat of a different style and has a number on his back which Weston does not.
The vegetation and geology near the river that Weston and Spike Barton fall into is different to the country through which they have been riding.
The background behind the rodeo announcer differs depending upon whether it is a long shot or a close shot.
In the bulldogging competition, the competitors are obvious 'stunt doubles'. Cheyenne's 'stunt double' is not wearing a vest, has a hat of a different style, and has a number on his back. Similarly Weston's 'stunt double' also has a hat of a different style, and has a number on his back which Weston does not.
A sign spelling out CALGARY STAMPEDE backwards can be seen in the rodeo footage.
The rodeo announcer uses a megaphone throughout the event, even though loudspeakers are clearly seen in the grandstands.
During the carriage ride, you can clearly see telephone/electrical poles on the road. These were not around in the old west.
About 10 minutes into the movie John Weston falls from his horse. Marshall Higgins walks up and hands him a flyer promoting a rodeo. The wide shot shows Weston standing and reading the flyer. The closeup shot of the flyer shows someone's hands holding it against a plywood background.
The film is set in a time when horses and stagecoaches were the means of transportation, but a sign in the background when Weston prevents the bank robbery announces a rodeo on May 1st, 1932. The clothing of the women is also consistent with the thirties.