RSS Feed import from another Easyblog only seems to work for latest blogs

I am trying to replace Feedburner as the preferred way of importing RSS feeds on many of my sites.
I have Easyblog as the main blog package on our main site ncadd.org it supports a number of different categories and these are really stand alone blogs.
The site has many affiliate organizations who pick up the various blogs through RSS feeds and these all work through various readers in both Joomla, Wordpress and others.
If I try to use the Easyblog RSS Feed Importer for a category feed from the main sites easy blog I get the message "There is nothing to be imported from the remote site currently." The same feed opens in a browser and Feedgator RSS feed and also passes the http://feedvalidator.org test. If I use the RSS feed URL suggested for the Google Feedburner section of General Settings / RSS Feeds that will successfully import all the latest blogs. But I do not want the latest blogs, I want blogs from each of the categories.
So this link will work
https://ncadd.org/index.php?option=com_easyblog&view=latest&format=feed&type=rss
This link works for other readers but not the Easyblog feed import
https://ncadd.org/index.php/?option=com_easyblog&view=categories&layout=listings&id=3&format=feed&type=rss
This is the SEO version of the above and it does not work either
https://ncadd.org/blogs/addiction-medicine?format=feed&type=rss
Can you test the feeds with your versions and perhaps advice what I am doing wrong?