This is a real issue, and I don’t understand why more people haven’t said something. Entire post bodies of posts are hyperlinked to nonsense URLs. I really like the theme, but I spent some time looking for another one before I decided to track down the problem. The culprit is the following curiosity in content-single.php:
<a target="_blank" href="<?php the_title(); ?>">
Since the browser assumes relative addressing, it appends the title string to the current location just as your code tells it to, producing junk. I don’t understand why the entire content of a post needs to be linked to anything, least of all (presumably) itself, nor why someone would try to use a post title as a URL. I hacked the nonsense out of that file and now it’s working fine. The same line appears elsewhere, but I won’t bother to hack them unless they create a problem.