On Thursday last week we updated our filters on the site and pretty much everything that could go wrong did. A lot of processes got messed up when we went live even though everything checked out on our test server.
So this is one of the things that has been reported to us so we're aware of it and it's on our list of things to fix. We think we know what's causing it and if that checks out we should have it fixed tomorrow. Hopefully thursday at the latest.
All of your missing babes are still followed. It just appears that something reduced the number you can see to 24.