Following feedback, HU have changed the display of the Community home page ( healthunlocked.com/cllsupport ) back to how it used to be, i.e. it again shows the latest posts. If you are interested in the top posts over the last month, (the recently introduced change) you can still see them by logging out and then viewing the community home page.
HU have also introduced a new feature based on their analysis of how members use the site. If you are viewing the News feed page, healthunlocked.com/ , to the right you'll now see posts you've recently viewed. Could be handy if you want to check for replies to topics you've recently found interesting - just click on the post of interest to revisit it.