I took a look and for sure your content has been stolen!
One thing I noticed.
I did the supplemental test:
Most of your site's index pages are supplemental. I believe they are indexed by Google as both a subdirectory and index.htm file:
show up in Google's results. Google was really complaining about my searches.
If these pages are the source of links to the hijacked page, Google may not handle this well. Don't get me wrong they should, I think other engines do. I think the thief linked directly from the home page, and perhaps this is a secondary factor.
In fact I'm not sure I'd try to correct this now until you resolve the theft. Just trying to provide any hints I can.
Webmaster Tools might provide a clue if you look at your internal link report?