Wishful Blog Theme issues

When I first created my web site blog with this theme it was full screen, meaning it did not have background showing up as borders along the sides of the pages. While attempting to tweak my settings, somehow I got these huge blank borders on both sides and a small one on the top of the page now and I can’t seem to make them go away. I can’t seem to find help from the Wishful people unless you purchase their premium version and I don’t know that I want to stick with this theme enough to do that just yet. Can someone help me find what setting got adjusted to do this please? Thank you.

The page I need help with: [log in to see the link]