I'm trying to create a companion, but the problem I'm having is that he doesn't persist. He'll follow me around like normal, but if I quit and reload the game, my follower reappears in his original location. When I ask him to follow me again, he says I already have a follower even though no one is.

How do I make him persist like all the other NPCs? When I look at other actors' references, they all say that their persistence location is "(all)", but I don't have that option in the menu.