Global Authors Post Feed not working like I expect

[hungryfeed url="http://www.sevenletters.org/activity/feed/globalauthorpostsfeed?author=2"]
So, I installed the plugin and tested it on a page. http://myfaith.online/51/testa/
But it doesn't post that author's activity. So I wnet back and created a few posts on two different blogs within the multisite. Still, nothing except the Site Wide feed.

I woulkd prefer to do this without the Hungryfeed plugin, but I am not savvy enough to know how. Please give me some guidance.

Something is working since it is listing a Site Wide activity feed of the primary domain,. but nothing else.