try moving the elevator controller (not the elevator caller) to directly under the bottom level of the elevator, then try it again, I found sometimes if the elevator controller is placed next to the elevator and not below it, it will clone the elevator blocks and the main ones will not move. I hope that helps, if not then i'm sorry I could not help.
the only thing I have found that causes this is having the elevator controller beside the elevator, not at the bottom of the elevator route, if that's the case try moving it to under the bottom of the elevator, if it still does it then i'm not sure, it could be something small is blocking it's path.
Well, I was building an evil science corporation, and I ended up breaking the mod.
I logged out while the elevator was moving, and so the elevator was glitching when I logged back in. I tried all I could to fix it, only to get it stuck hovering around at the top of my elevator, unbreakable.
Unfortunately, I was in idiot mode at the time and forgot to back up the world, so I can't fix it.