i reported that bug here:
http://www.joomlart.com/forums/topic/products-page-diferent-from-the-demo/
Dont expect a fix neither an answer from the JA staff, it has been months since the new release of VM and the template stays the same. I suppose it just works in J1.0x..
That bug in particular is caused wen you dont have nothing in the right module area published.
The product page gets widther and the backgound image dont cover the heading compleately.
if you are in an early stage of development i advise you to drop Larix, see this:
http://www.joomlart.com/forums/topic/products-page-diferent-from-the-demo/