I'm in my own made interior cell. I used the propylon index teleport thingies to teleport myself from the one part of the interior cell to the other part. (in the same interior cell). The problem is...

When i get in the second part of the interior cell i can walk trough all static objects. Just not npc's. When i jump i fall trough the floor and end up in the room again.

I didn't do anything strange with the static objects the part i can walk trough is made of. It's a copy of the other part, which works fine.

So does anyone know what is wrong?

I'm not sure if this is what's going on with your cell or not, but i made a cell once that was a long cave turned vertical, basically a shaft going straight down. I had to shorten it b-cuz when falling down it, just before hitting the bottom, i would warp back to top. Something maybe about beieng too far away, it was strange. If your other area is a long ways off that might be the trouble, i'm not sure. Also it's been a while but i never got doors to teleport to the same cell properly, i forgot what happene i just don't try it anymore, i just use a script on it.

I made a new cell for the part i could fall trough. Now it's working fine. (The mod is almost finished )