At the mine exit, Jim takes 5 sticks of dynamite from Artemis' costume, but moments later throws a total of 6 sticks in the course of their escape.
When West is pretending to be a magician he pulls a rabbit out of a hat, then puts it back in the hat and puts the hat back on the table. There is a cut to a close-up and he puts the rabbit back in the hat and puts the hat on the table again.
When Artemus tricks the guard, he repeats a common error in quoting William Shakespeare's "Hamlet" Act 5 Scene 1. "Alas, poor Yorick! I knew him well". The correct line is "Alas, poor Yorick! I knew him, Horatio."
Avery misquotes "Macbeth", Act 5, Scene 8 when, being escorted through the tunnel, he says, "Lead on, Macduff". The original line is, "Lay on, Macduff; And damned be him that first cries, 'Hold, enough!" It is the last line spoken by Macbeth before he is killed. In popular culture, this challenge to fight is commonly mistaken as a command to lead the way.
If, in popular culture, a Shakespearean line is oft misquoted or misused, it is not, therefore, a mistake on the part of the character, but rather, a character who is part of a populace who commonly misquotes or misuses lines from Shakespeare. Avery is, after all, a bit of a poseur. He even admits in a conversation with West that he doesn't know Shakespeare, but he does know people.
Looking at Jim West's hair--it's obvious in the last scene that Jim is with Laurie in the train car--Jim West, that is Robert Conrad, is wearing a hair piece. His wearing a hair piece is obvious in this scene and many others in this 1st season; just look at his hair when he is in the train cart near end vs his hair in final scene with Laurie.