This is because of the with the way the AW sites are done.
A lot of what is on the main FAA site, is also linked through everyones AW pages (and pixels.com and all the other faa sites)
So, for instance you can read the forums through any of the users AW site, like this:
http://firefluxstudios.artistwebsites.com/showmessages.php?messageid=1972592
So, if you post things on FAA in the community pages like the forums and blogs, you can easily end up in Google or any other search engine, under other peoples AW sites URL.
You're not actually on their AW site, its just because they have picked up content through the AW pages, and the common links.
Probably would help if FAA blocked the community pages through AW sites, or maybe even if they used the 'canonical' meta tags to tell the search engines its duplicate content.
HTHs,
Rob.
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Fantasy Art Web Site