Both green check mark and cloud icon on folders which I marked "make available offline" on Mac OS

Thanks for the article. This doesn't explain it. I have tried marking the files and folders: "make available offline" and nothing changes. Keep in mind, it's not only folders that have both icons, it's both files and folders.

The only way to get rid of the cloud icon is to try to open a file. Then it downloads and becomes truly available offline.

I have tried selecting "make online-only" on the entire Dropbox folder, which works fine.

Then I attempt to mark all files and folders as "available offline" and the app indicates it's syncing around 500GB of data but it completes in around 60 seconds and I am back where I started with the same problem as per the image i posted in my first message.

I have had Dropbox for over 10 years and so am fairly experienced with it.

Short of trying to download every single file (one by one) in my Dropbox folder (there are 48,800 of them) I don't know what to do to fix this.

I have uninstalled & reinstalled Dropbox. I have uninstalled & reinstalled Google Drive (which to be honest I am considering moving to now) thinking there may be a conflict, but nothing works.

Surely I am not the only one with this issue.

Please advise of a method to reindex or reset settings to force Dropbox or my Mac to discard existing settings and start again. 

Cheers