Board Thread:Skyrim/@comment-118.10.28.6-20140811115202/@comment-6881629-20150422163456

Its nothing to do with Storm Call but sometimes a bugged corpse will just appear (and possibly follow you around) if your on a console reload like Alduin said and it may not trigger otherwise the only thing to do is use the effect of some spell (Raise Zombie is pretty good) to push the body to somewhere it won't bother you so much. On the PC you can just delete the body with a console command.

Also if you kill a dragon at a location like a wall and then go back and kill the respawned dragon at the same location it won't turn to bones (or give you a soul) those will despawn though (the ones mentioned above don't seem to).