Did you complete a quest with a certain infinite star shaped soul gem? If you did then that might be why
Yep i have the Azura soul gem in my invent, but have not used the soul it carries as yet.
Do you conjuration? If so, I saw a possible explanation / quick fix some where here in the forums and it was a console player how figured it out. Give me a min. to find the link to the topic.
I've used conjuration to raise various corpses, but when i think about the Horde that came after me, it could well be a bug of sorts, case of game updates and your saddled with a minor bug (or major, depending on your view of it), in this case it seems a dungeon/cave/ruin somewhere was emptied of its occupants and got attached to me when i fast-tracked, i will however take a look at that link see if it relates in anyway to what happened to me.
I've taken a look at the post in the Link carrots gave and although its similar to what happened to me, its not quite the same, unless the those creature that you have re-animated are in your active effects but dont appear there at the same time if you get what i mean. I check my active effects quite regular and have not seen any left-over deaders. Also the last time i re-animated a corpse was about a week ago at the very least so i am thinking that its a dungeon/cave/ruin Horde thats gotten bugged with last update and ended up being attached to me when i fast-tracked.
Its only done it this once, and i've fast-tracked a few times since dealing with that Horde
