Deus Ex Alpha

This often happens when I copy-paste the same mover.

I made a cubic room, no features, and a smaller room by it's side, so that they touch face-to-face.

I made the simplest mover:
Cube->add->texture->intersect->select dx mover from classes->make mover.

Placed it inside the smaller room. Everything worked as expected.

However, if I copy and paste said room with a mover anywhere on the map, some copies/original will simply disappear, while some will look like they have a copy of themselves stacked below them, through you can walk through that stacked one.

Clearly looks like a BSP error but why does it happen and how do I avoid it?

UnrealEd 1. I'd rather try and find any possible solution for UED1 before switching to UED2, because I like it more.

While I don't suggest copying movers at all, I think you should try copying the room without the movers and then adding them to it.

Not quite sure if I understand your problem, but just try not to copy your own brushes and movers, although it shouldn't give too much problems

I know, I'm not much help