In the current public Beta of DTPO, duplicating an item via cmd-D produces two copies of the file.
Also, sorting via the “move” button in the auto-classify panel deletes every other replicant of the same file. Maybe it is a default setting, but unfortunately it prevents me from using the clever auto-classify panel at all. To be honest, I am actually a bit scared of it, because I put a lot of work into replicating files into several groups. Without this, I could start using the automatic classification, which would reduce my workload immensely.