Blog only filling half the page

First let me say that reading other peoples’ support questions and the responses has lead to me solving most my problems as I use page builder and Vantage for the first time.

I have a question remaining the blog though.

When I post a blog, the blog only fills half the page and the right side is completely empty except a button to go to the next post. http://www.historybufftravelguide.com/destinations/china-destinations/xingping/ Is there a way to fix this issue. I’ve tried using default, full width and a page builder row but can’t get it to change.