Search page weird spaces

Hello,

I love this theme and I have been using it for almost a year.
I updated the theme a month ago (more or less) but since that moment I have a problem with the “sections” of my site.

As sections I use searchs in my posts by tag. It worked fine until the update. Now there’s a white space between posts results.

Any idea about how to solve it or if it is a bug?

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