In the bar Ott tells Bletch "you wanted a duel" but Ott wasn't present in the bar to hear it when Bletch challenged Lucas to the duel.
Earlier the bartender threw two darts into the wall. Later, Lucas picks up his rifle and shoots the two darts off the wall, but there are no holes where the bullet supposedly struck.
Before heading out to track down Drosheck, Lucas tells Mark he is going to leave him with Millie until he comes back, but Millie Scott doesn't join the series until 3 episodes later.