Plot Hole?
A couple episodes ago we had Rose laying a trap for Joshua. She gets him to tell her the identity of final horseman and then kills him. Before he dies, he tells her that he lied (I think he told her the horseman owned a mining company or something).
Later, in episode 11, we learn that Rose already knew one of plowman brothers would become a horseman and played them against each other. Am I missing something here? How did Rose find out about the 4th horseman?