One more bit of testing I did that leads me to question the whole strategy, Instead of deleting everything and emptying the trash between tests, I left the files from a few previous tests in place and added additional scans (some new scans of the same document, some copied and pasted from the Finder Trash). I noticed that the rule seems to be firing and creating additional duplicates of files that had already been moved from the inbox to their respective group.
I haven’t figured out what this means, but I’m thinking an approach that Imports rather Indexes may work better. I can live with the PDF being relocated in the file system by DT3.
still reading the help and Take Control ebook.