I use ctrl+d to duplicate, but I have been using that all along. I don’t know what the original button is.
I create a folder for each Play Raw I want to examine. I download the raw into that folder, and then I download each contributor’s sidecar, giving each a unique name containing the contributor’s name.
Then I use add to library to create the 0 version. I create as many duplicates as contributor sidecars there are and then load the sidecars into the duplicates.
What is happening is that the duplicates are not being created, and if I go to another library, the 0 sidecar disappears.
How I differ from most users, however, is I use --library :memory: in my shortcut run line. I don’t use the dt database.
I don’t doubt what you say; maybe all of my above explanation will provide the information to someone who reads this necessary to figure out what is happening.