Sounds good. Maybe a bug, maybe not. When you run the check, there should be 2 lines below the buttons that tell how many profiles it examined. This shouldn't be 0. If it is, let me know and I'll see if I can recreate this.
Also make sure that Check Open Profiles only is unchecked.
Another way to check that everything is tested is to change Profiles to report All profiles -- or Sources for All Profiles.
And, if you are checking your Watchlist and it's fairly large, well glad you have the patience to wait for it... I think you will probably get the more recently created profiles if you change Check starting at to something like 2000 (assuming you have about 2900 on your watchlist).
Then you will be almost ready to move to another way to check fewer at a time -- for How to find profiles select Check Profile, then put in a profile (e.g., Name-XXX) and check several generations of ancestors and/or descendants.