Welcome to Skyrim Forums! Register now to participate using the 'Sign Up' button on the right. You may now register with your Facebook or Steam account!
You are using an out of date browser. It may not display this or other websites correctly. You should upgrade or use an alternative browser.
I never have those problems since I just Dead Thrall them on the spot. However unless it's a very short dungeon and I have 2 thralls already then I just leave them and come back later.