Tweaked the Administration menu and fixed basic Invisible Walls. Still much work to be done.
You should look into what I did to solve the issues with invisible walls and reorganize to your liking. Structures are your thing. I'm assuming you were sleepy when you created the wall structure because a lot of necessary data wasn't being saved. Anyway, I get lost so easily in the structures, they just seem a tad convoluted to me, at least with the way the invisible wall structure is setup.

There are still bugs with invisible walls, mainly being vehicle related. I basically just made it work, I didn't iron out the kinks. I left a couple of FIXMEs for some already known issues.

I also made a few changes to some methods that had the potential to cause issues. Missing null checks, backwards logic, etc.

Anyway though, the walls actually do stuff now! I might do some more work, but I might go to sleep too. I haven't decided yet.