Ehh?

How come the prop_dynamics for the elevators aren't showing up?

I know they are there, they still have their solidity.

Check the fade distances, it's likley you accidently dragged one of the helpers and fucked it up. Start fade should be 0 and End Fade should be -1.

It didn't help,

http://www.zshare.net/download/7882874e7284e8/

Here, see if you can fix it in a way.
I'm not even sure what is really the problem.

I've reseted most options in the prop dynamics btw.

Havn't seen the map, but I got this quick idea. Do you use any special render mode for the entity?