Other mistake: At the beginning when Festus rides up and finds Riley Sharp handcuffed to the hitching rail, if you notice the handcuff chain is draped over the top of the hitching rail and there is nothing preventing him from sliding the chain off the end of the railing.
Other mistake: Near the end of the episode, there's a gunfight, and they show Matt Dillon reloading his gun. Just after the gunfight, you can see the extra bullets on his gun belt. None of the bullets are missing.