While Lucas is standing in as Deputy while Micah is out-of-town on business, throughout the program, he is wearing the badge on the wrong side of the shirt.
During the show the bank robber's name is Rudy Gray. Even on the wanted poster the name last name is Gray. In the closing credits the name is listed as 'Rudy Gay'.
The photograph on the wanted poster is extremely high quality. Much higher than can be expected using 1880's technology.
When Dave Foley pays Nils ASwenson for building a box, Nils says the cost is $3. A moment later Lucas picks up the money and hands it to Nils, but Lucas is holding a single bill.