For some reason I can order Erandur to follow me, despite the fact I have never done, and never will do, the vaermina quest.

If I order him to go home he returns to the tavern in Dawnstar.

Anybody else have this?

I said in another thread that Skyrim is full of great glitches. Some that you may experience may not be the same for others. I personally have never seen this one. Sounds like a cool one to have though.

no not really, do you have any mod?