The log shows that your home path is /home/donb, so your Linux username is donb. While your "display name" might be "DonB", it's not relevant for SSH (WinSCP). For SSH (WinSCP) the username matters. You should see the same behaviour with any other SSH/SFTP client. Does this answer your question?

Hi all:
I think I found a bug:
When I log in with my Zorin Linux 18.1 User and Password, I have it with:

Username and Password as password - Note the conventions as shown.
Yet, with WinSCP I had to type in Username as username Bug or not?