Is this... not allowed? I know that if you have, say, two doorways on the same wall and they both have areaportals covering them, they'll be merged into a single one when the map compiles. But if one of them, for some reason, is a func_areaportal_window, does this cause problems? I ask because my latest attempt to compile something is giving me all kinds of "areaportal brush doesn't touch two areas" errors, and after disabling everything except world brushes and areaportals and looking the map over, that's the only reason I can think of.