[Plugin: CSV Multifeed] Strange problem with Next/Previous Post links

I had the same problem. It’s because the previous/next links are based on the publish date and time of the post. This plugin posts all posts from a feed at the same date/time and now WP is confused and will only show one of them in the single posts navigation.

The work-around is to use the drip feature and set it to publish 1 post every 1 minute. That way you still get your posts published relatively fast and you no longer have the navigation issue.