I'm having some severe issue with a map I'm working on

I don't know what happened, but suddenly when i was building some 3D floor, the map suddenly started behaving strangely. All slopes got freaked out and some floors and ceilings git their heights changed, and the most weird part is that WadAuthor tells me the map is fine (lots of errors, but slopes and heights are just as I want them). However when the map plays, it gets all freaked out.
Can someone help me?

BTW the map is Mainframe from Quake 2 PSX
EDIT:
I tried swtching to Wad Author's internal node builder and it fixed the problem... looks like it's a bug in zdbsp. I used ZDBSP 1.16 and then 1.14, but both gave me the glitched node build.