Lightmap issues

[Scoliosis]

for some odd reason the lightmap on my map seems to be doing very odd things. Sometimes the top part of the map doesnt load the lightmap correctly. it doesnt even load the default lightmap, it loads like a bright non shadowed lightmap across the top area of the map. You can tell cause its the same brightness all the way across. THis only seems to happen after i add chunks to my scnr tag. All iv added is a few mach tags and some netgame stuff. Why is it doing this?

Right now putfile is down and ill put pics up ASAP.

EDIT: K finally putfile is back up so ill upload the images