Layout choice not working

I am using a StudioPress theme called Modern Portfolio.
I’ve run into a problem with choosing the page layout I want for my blog versus the other pages on the site.

I’ve set in the Genesis theme the layout to be without the sidebars.

And then on the blog page I’ve selected sidebar to the right only in the layout choice on that page.

However, no matter what I do, I can’t seem to get the sidebar showing on that page only and not any other pages.

Can anyone help me please?