I'm using Windows 10. My Documents is not a thing anymore. There's a 'Documents' folder, but it's located under OneDrive. The file pathway is, in short, totally different.
I have to say this surprised me. I'm currently writing this post on a computer running Windows 10, and there is a 'Documents' folder listed under 'This PC'. In fact, I'd personally never even touched the 'OneDrive' part until just now to see if that really did have its own 'Documents' folder (it does, and it seems to be unique from from the one in 'This PC').
I cannot vouch for your setup, though, and it sounds like you've managed to sort it out, anyway. I was just intrigued that you only seem to have the one 'Documents' folder.