I made a buillding,(That you can walk in), In XSI. After I finally got It Ingame, I put some spawn paths inside of the building. The problem Is, sometimes the AI spawn on the roof of the building, and I'm not that sure why.
I placed each spawn node on the ground, none are on the roof...
Any help here would be fantastic, thanks.

Try replacing this spawn path after deleting the original. If it still does not work, then try adding and testing a single spawn node at a time until the AI no longer spawn on the roof of the building.

Thanks for the ideas, I'm trying them out now.