The section under the header photo is split 60/40 with a photo. Leaving just text makes it all on the right. I couldn’t figure out why, until I added a photo. Now it looks good.
The widgets start on the left and move right. I too would like them centered. Please let us know if you figure out how to do it.
If you want to center the post content when you don’t have a post thumb you can use (desktop resolution only): .entry-content-wrapper {
margin: 0 0 0 460px;
overflow: hidden;
} instead of the original .css.