Curt is drinking brandy all night in the saloon and appears drunk, then a few minutes later in the final showdown he's sober as a judge.
When Dan and Curt are in the shootout in the street at the film's end, the sheriff shoots one bad guy in the small alley and he falls dead behind some boxes unseen. When Dan and Curt run into the alley, the body is now in full view and they have to step over it.