Fullwidth Boxes

Here’s a link to the page I’m having issues with:

http://www.parsnipsandpaddocks.com/?page_id=5340

I’ve changed the layout in Highend Options to “Fullwidth” as I’m trying to extend the rows across this page and I’ve shut off the sidebar navigation. However, no matter how much playing with it I do, it still runs the text or image off the left side of the page, and leaves a huge white space on the right as if the sidebar is still there. Is there a way to get my rows to extend across the page in the ratio that I want (1/3 + 2/3)?