I'm one of those experiencing the Miraak glitch where I am absorbing the souls instead of him and he stays ethereal. I want to do the fix that Elderdrake suggested, but I'm concerned I will be charged twice for the DLC since I got it from X-Box Live. I'm completely new to X-Box, please forgive my ignorance!

Once you have paid for the content, it is tied to your Live Account. You can log on and redownload the DLC as many times as you need to.

Uninstall and reinstall at no risk.