Leo,
Sorry to keep troubling you on this intermittent problem. I may be misunderstanding something. I have created a word doc, but it looks like I cannot attach it, so I am copying it into this post. I contains multiple screen shots to hopefully clearly demonstrate my folder set up and questions.
Elliott
Leo,
Let me send you more screen shots. Perhaps I am misunderstanding something. Below is my tree structure as seen in Opus.

Here is my tree structure as seen in Explorer. As you can see it does not show the duplication of Documents as seen in Opus.
And for one more piece of info here is the Opus folder structure for my User name on this machine, a91rqzz, i.e. in the path C:\users\a91rqzz.

You told me to right click “Libraries” and choosing properties. I am not sure if you meant to click on Libraries on the heading Documents. Here is what I seen in the various cases.
Right click on Libraries

Right click on the first entry of Documents.
Right click on second entry of Documents.
On problem that I cannot demonstrate right now is what happens when the duplicate files names and folder names appear. As I said Opus is intermittently working correctly, i.e. not duplicating the file and folder names, or NOT working correctly, i.e. duplicating the file and folder names. I have been unable to determine a pattern. When there is a problem it sometimes just goes away with time, or often I can fix it by closing all instances of Opus and restarting it.
Does what I sent you suggest I have my folders set up incorrectly? I have another win10 machine (not a corporate one, with win10 home edition) and the folder structure seems to be the same.
Your wisdom is appreciated.
Elliott