Unable to display full posts in Home

As you can see in the homepage, even though I set up the “show full posts” in the “reading” menu under settings, I always get a 3 column view of the posts, with only excerpts. I also tried to change the Oria css, but when I do, the post width increases but the 3 columns view remains the same (truncating the exceding post width).

I would like to have the full posts showing in the home page (no excerpts), full width, is it possible?

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