The first bug has been fixed, and the second one is because the (removed) explosion dropped some debris on it, I think... It should have some stairs imo, but i didn't add it myself
the fixed version has a few new bugs because of a full (-both -final -StaticPropPolys -TextureShadows -StaticPropLighting) compile; mainly light/shadow bugs.
Its on my dropbox atm, but DBP hasn't seen it yet so i won't post a link here...