I found a solution of some sort. Since I need only one featured post, I simply changed on the row before the Loop call on index.php
On a line 76 I changed `
<div id=”content” class=”site-content” role=”main”>
to
<div id=”content” class=”featured-content-secondary” role=”main”>
Now wordpress calls class featured-post-secondary instead of site-content. I also changed width of .featured-content-secondary article on expound.css to 300px.
Because I do not need featured secondary posts this was easy. If you need them and also want to arrange older posts into columns, I think you can do it by duplicating the featured-post-secondary class, rename it, modify the width to meet your needs and then calling it on index.php
