I don't think anything is confusing. Nobody is saying, afaik, that posts in the FS9 forum apply to FSX or the Return part of the forum. The OP was referring to FS9 sceneries and so was I in an FS9 forum. He has a problem and I can help. I'm trying to figure out what's wrong with that.
As far as the install order is concerned, what I do is the WA sceneries first, then Van+, then Vic+ (I read somewhere Van before Vic but don't remember why), then Misty, Tongass, GB (you'll switch back to the Tongass setup afterwards automatically).
All this after UT. Hope this helps.
Edit: Oh yeah, then all the misc downloads from Misty Moorings, Tongass etc. You can find some other things at Avsim and Flightsim for those programs as well.