Change something in this Theme Wonder

Hello
This is the situation.
My website is wordpress with the Theme of themebeans: Wonder.
(www.suzettehuwae.com. NB: ONLY the homepage is fullwidth)

Somehow every OTHER page ( not the homepage) is not full width. all in the center and very narrow on the sides.
Now ive used a plugin Ubergrid for a seperate page for my graphicdesign.
But it is not showing 100% width.

Its only about this page/link:
http://www.suzettehuwae.com/graphicdesign
the rest of the site is the theme Wondertheme of
Themebeans. And has nothing to do with this link
as I want to keep it separate. The link is just
for my graphic design portfolio.

I have used the Ubergrid plugin on that page.
Somehow the Ubergrid, my buttons are full width.
http://codecanyon.net/item/ubergrid-responsive-grid-builder-for-wordpress/full_screen_preview/4851992

but on my page it is restricted. on the sides as you can see
its just limited to 2 boxes
It stays in the middle/center. My colleague checked it but couldn’t find it.
Who can help me? Im willing to pay if its too complicated.

I hope to hear from you soon,
Best,
S