Aha—I’ve learned something new about Smart Rules. I do not see that any new groups have been created in the Sources2 database where I want them. I do see that new groups have been created in an Inbox (inside the Global Inbox but not the database Inbox?) but given the behavior of these groups (each file seems to have a group, rather than files with the same prefix being in a single group), I am thinking that they were perhaps created by a previous attempt at this rule and not by BLUEFROG’s elegant formulation.
Screenshot showing the inboxes and the groups there:
