Double Posts on Auto Post

I’m getting double posts on 1 particular feed:
http://www.freestufffinder.com/feed/
It’s pulling duplicate posts from this feed:
http://feeds.feedblitz.com/
There are references to the feedblitz feed within the original feed, I just don’t know why it would pull the same information twice.

https://wordpress.org/plugins/wp-rss-multi-importer/