That's bad.

Lifts do that in games. They're prone to bugs.
Theres one in Minervas Den(Bioshock 2 dlc) that's a menace. You think you're going to leave after the boss fight, and it crashes the game while showing the load screens constantly. You hit quit game, the PS3 crashes and restarts.
Some lifts and doors do exactly the same thing in Skyrim.
The only thing I can think of is, delete the character, every single save.
And start again.
Bugs like that don't go away. It's attached to your character and will probabely reoccur. And spread.
If you don't have to use that lift, ignore it.
But if you need to, then deletion is the only answer, I think.
Maybe there is a PC fix for it.