Old Sod Thank you for describing your process. Actually we do not recommend grouping all unknown people into one “Unknown” person, as this may negatively affect accuracy of suggestions for actual people. It is the best to either delete those faces with “Ignore all unassigned” or just leave them be. Many users prefer just leaving them as it is.
Current version only saves to .ini files information about assigned people, but we get requests from people to also save information about about ignored faces, so when this archive gets indexed again, those faces do not show up, we are considering adding this function in the future.