This has gotten very complicated for me but I would like to repeat a couple of points that Leo made that I stumbled upon myself and which help me with my dupe finding
How the files within the groups are sorted has never changed:
[ul][li]They are sorted according to how the file display was sorted before you ran the duplicate finder.[/li]
[li]They can also be re-sorted by changing the file display’s sort order and clicking the Select button near the bottom of the Duplicate Finder panel (assuming you are in Delete mode).[/li][/ul][/quote]
The first point is the most important. Changing the file display before finding Dupes greatly effects your results. Another trick that might come in handy, when finding Dupes below ONE folder, try using Flat View. It can help you understand the total pool of data that you are working with and which way of pre-sorting works the best.
I think Leo’s second point was lost on some. Once you have your list of duplicates and you don’t like the choice that DOpus has made for deleting (checkboxs), sort the dupes a different way and then click the Select button. DOpus will then re-select the checkboxes, always leaving the top-most one as the “keeper”.