I did a poor job of explaining so let me elaborate. When choosing "Import from Another Catalog", the "Catalog Contents" section is a series of Folders. When you import a Folder, not only will those images be imported but any Collections that they were in inside the other Catalog will also be built and populated in the Collections section of the current Catalog. At least that's what happens on my system with my current configuration. The contents and names of my Folders and Collections are often extremely similar which is where I messed up in my original explanation. Sorry for any confusion.
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