Engrave (Lite) Extra Space Issue Under Posts

I have the blog posts displaying in one column. For some reason, the containing div surrounding the post excerpts is adding 500 pixels more than is necessary, leaving a large white space below the last post.

Reloading the page seems to cause the issue to disappear.

The URL is http://www.autumntrailsvet.com/category/blog/

Any idea how to fix the issue is much appreciated.