At the beginning when sheriff Mike Strata meets Josh , he is telling him why he sent for him - he says "the women of Colorado" instead of the name of the town, which is Coronado.
Perhaps this is more a character omission, than a character error; but the character José (seated next to Simon Denton, played by Olan Soulé) in the saloon has a considerable number of speaking lines. Oddly, he is not credited or even mentioned at all anywhere in the intro or outro.