I have fixed this - the problem was that on you're site you'd set the Content Item includelet on the homepage to inherit to all sub-pages.
The Content Item includelet is a placeholder for the WYSIWYG page content, so wherever you place this includelet in your page layout is where your content appears.
Every page automatically gets a Content Item includelet when it is created. And so, because you had set the one on the homepage to inherit to pages too, this meant that sub-pages had two Content Item includelets, and hence displayed the content twice.
I fixied it by turning off the inheritance on the Content Item includelet on your homepage.
(hopefully that makes sense! :-))
Thanks
Joe - Voice Admin