@amjedm wrote:
... It appears each user account is being treated as a separate device. ...
Hi @amjedm,
Actually Dropbox doesn't count user devices. Such a statement is a marketing trick. Dropbox count all application' links to their servers and "label" them as "devices". Stupid but fact; that's it. You are trying four links (from your four win accounts), something Dropbox assumes as 4 devices.
@amjedm wrote:
... . I didn't have this issue with Windows 10.
...
No, there is the same issue! Seems you have found a workaround somehow (probably unintentionally). Use the same workaround! 😉
Hope this gives direction.