Fixed or Fluid layout settings not working?

Hi, my first post here, so first thank you all for such a great WP theme

quick info:
Wordpress version: 3.1.2
Atahualpa version: 3.6.4
PHP version 5.2.17

I've recently been changing my site over from a fluid width to a fixed width site.
When changing the WP part of the site I of course went into the Atahualpa "Style and Config Layout" options and changed from a fluid width with of 99% with a minimum of 800px and max of 1280px to a Fixed width of 980px.

The problem is the fixed width setting is not taking effect, also changing back to my last fluid settings is not working for me now either.

I have no cache plugins installed and I've stripped everything from the "add html css" areas, I've tried running with out my menu and with a smaller header image but nothing seems to work.

I'm starting to think it's another setting in Atahualpa that I'm overlooking or in conflict with?
I've really dug through the forums and I just can't find what I've got wrong.

Any suggestions or help would be fantastic as I'm completely tapped at the moment.

Thanks

P.S. blog in question >> http://blackberryvoodoo.com/blog