Remove empty space after sidebar removal from blog page

Hi,

I use Vantage Premium theme.
I had issues with removing the sidebar from the blog page, so I did as described in this thread:

Remove side bar from blog page

It worked, but the “white” space is still there, in sidebar’s place.
Could not remove it even with the code from the above thread added in the Custom CSS.

Here you can see the uneven space on the left of the blog posts grid:
http://fitwithandy.com/blog/

Thanks,
Andrei.