Duplicate iMovie projects not visible when copying library

iMovie library dupes not seen when copying one Lib to another?.

Went to copy(import) some projects from the Main Library (ext SSD) to the b.u. ext SSD.

After copying and checking with "open contents..." there are 3 extra Projects in the Main as compared to the b.u.

Yet when copying, those 3 extra Project do not show. They are a dupes of a Project on the main. My client is dupe crazy.

The size difference of the 2 Libraries reflects a difference.

I assume since they are dupes, this is why the copy function doesn't see them?