“Blog Posts” Page not displaying properly

When I click to edit my “blog posts” page, I wanted it to show a preview of maybe 6-8 posts with the same sized thumbnail and excerpt for each, in 3 columns or 4 columns. When I’m on the “edit page” portion, it shows how I want it. But when I look at the published page, it just shows all the blog posts down one huge list, with the featured photo of each blog taking up the entire screen. When I look on the phone it’s like this too, I have to scroll down a lot just to see the next few posts listed.

Is there anything I can do to get it to look the way it looks when I’m in “edit page” mode?

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