Before Bart Maverick leaps from the baggage car, he's wearing a dark-colored shirt, a light-colored hat and jacket with no vest. After he (or his stunt double) jumps, Bart is wearing a white shirt, a dark-colored hat and jacket, and he's also wearing a vest.
When Red gets shot and dies his right hand comes to rest on his stomach. After a few shots later his hand is out of sight on the ground.