So, basically what the title says. I think it happened after I went back to Skyrim on one of Neloth's quests and I happened to get the message for the Unearthed quest. What I think went wrong was that I got this message while in Skyrim and not on Solthiem. Anyone else have this happen and maybe know a fix? Both my previous saves don't go back before the glitch.

Try these:

*Clear you cache on your hdd
*Re-downloadload the dlc
*Re-install the game

You may not have to do all of the steps listed above and I can't say it will fix the issue but I've heard of it working for others so hopefully it will sort it for you.