When Marshal Strett first confronts Ringo, he brings three deputies with him. Later, when Deputy Charlie comes to sit shotgun, Ringo doesn't recognize him and asks the bartender, "Who is he?"
When Jimmy Ringo goes into the hotel room to get the sniper with the Winchester rifle, the lock on the door is just a handle. There is no mechanism to go into the jamb to allow the door to lock.
When Ringo and Molly are standing and speaking alone in the Palace Saloon, the mic and part of the boom are visible in the mirror above the bar.
Jimmy Ringo says at one point, "Here I am, thirty-five years old. I ain't even got a good watch." The real Johnny Ringo died at the age of thirty-two.