How to move the comment box

The comments block appears after the post content.

If you’re using a ‘related posts’ plugin which adds itself at the end of the content, then that’s before the comments bit and there’s no way to reverse the two. You’d need to look for a different plugin which hooks in a different location (after the comments?) or use custom code to hook the plugin into the theme’s cryout_after_article_hook or cryout_after_content_hook locations.

You can reduce that space with:

.single article {
    margin-bottom: 0;
}
#comments, #respond {
    margin-top: 0;
}