In the scene where the stagecoach stops and meets up with Cutler - shortly after Cutler talks about his partner, the stagecoach driver, Charlie, has his leg over the rail of the seat. Every shot of Claude Akins afterwards shows Charlie with his leg down off the rail. For the rest of the scene Charlie's leg keeps swapping back and forth. At the end of the scene when they are leaving, Charlie once again takes his leg off the rail.
When Dowd is lying in bed right after being trampled, the amount of his jacket and shirt that is unbuttoned changes between shots.
The Foley seems to be hitting a drum or wood each time Adam or Cuttler's blows throws the other to the ground. The ground is soft dirt so the sound should be muffled scuffling not loud thumps.