Re: Article as home page
By "article" do you mean a wiki page? (I'm guessing so, judging from the title "About". Tiki has another feature "Articles".) Anyway, the "use different URL as homepage" seems to be broken in Tiki 6.2, and possibly earlier versions. But you could specify "About" as your wiki home page (if "About" is a wiki page), and then set the Wiki homepage as your site homepage, if that would work.
-- Gary