Weird out on Favorited Posts Shortcode

Slapped the shortcode into the page, went through favorited some listings and I get this: http://grab.by/yI80

Here’s my demo site: http://wp.contempographicdesign.com/wp_automotive_2/

And the page in question: http://wp.contempographicdesign.com/wp_automotive_2/?page_id=826

Also I’m noticing it doesn’t work with custom post types? Or is there something I’m missing?

https://wordpress.org/plugins/wp-favorite-posts/