About a year ago, we were not ranking lists. They were available for search engines to index freely. As Listly got popular, we saw a lot of spam and thin content on many of the lists. To protect the service from losing out in SEO ranking, we implemented author and list rank so we can filter out poor content more effectively.
Taking a quick look at your lists, I can see that they are ranked fairly well, but don't make the cut by a few points. If you can your profile upgraded (more linked accounts), more followers (for yourself and your lists) on Listly, you should be good to go.