When Randall and Kale are sitting at the bar, the bottle of whiskey that Randall is holding is full. Kale talks to Randall and convinces Randall to hand him that bottle. You see the bottle in Randall's hand is full of whiskey but in the half-second it takes for it to be passed to Kale's hand it goes down to 2/3 full...
When Josh and prisoner are riding in the stage coach the view out the window is black and white colorized version.
When Kale asks Randall his name, Josh replies, "Peter Rabbit." The series is set in the 1870s, but Beatrix Potter's "The Tale of Peter Rabbit," which introduced the character, wasn't published until 1902.
(at around 10 mins) The stagecoach and a wagon pass one another. In the far distance is a high tension power line tower.