Deliberate mistake: At the end fight scene, when they are in the barn one of the men falls crashes through the wall when they get hit, spilling the fight to the outside. Unless the barn's walls were made of cheap plywood, the wall would not have given away so easily. Obviously done for dramatic purposes.
Orville Boggs: Philo... Jordan said he'd give us 200 big ones if we scrap that Merc for him.
Philo Beddoe: Great. Clyde? Scrap the Merc.
Orville Boggs: Come on, Clyde! You got work to do.