Onedrive adds folders already in Dropbox

When I recently did a clean install of Win10 on my wife's computer, it put a number of folders in her Onedrive folder (without asking!). She has an outlook.com email account. This was quite fortunate in a way because one of the folders was her Desktop. This helped in the clean install. She logs into her computer using a local log-in.

My question relates to Onedrive, Dropbox, This PC and User-gerry for documents, pictures etc

What I find, is that there are folders for documents and pictures, in Dropbox, Onedrive and in This PC. There are no such folders under users-gerry, but Dropbox and Onedrive are there.

For example:
Onedrive
- Documents
- Pictures
- Desktop
- others
Dropbox
- Documents
- Pictures
- others
This PC
- Document
- Pictures
- others
Users-->Gerry
- Dropbox
- Onedrive
- others, but no separate documents or pictures folders

I tried changing the name of one file in Dropbox Documents, but that change did not show up in Onedrive or the This PC folder. I could do some more testing, but it seemed folders are not synchronized.

The above resulted from doing a clean install to a new drive, then copying the key folders over from old Win 10 drive that I put in an external enclosure.

What I am looking for, is a way to make sure that all folders are at least synchronized and in proper locations.

Thanks for any help