Hi Dave,
I presume you need to contact Davis to get that straightened out as the Device ID seems to be the differentiating number.
I have two accounts and one Pro subscription. Most of the time I have the WL.com account with the WLL as the Pro subscription, but I can remove the Pro subscription from this account and then make the WL.com with IP logger the Pro account. And change back and forth as I please. However, every time I change from the Basic account to a Pro account I need to remember to set the interval to 5 minutes as it defaults/keeps the 15 minute interval logging from a basic account.
My WL.com with WLL account
Account Info
API Token v1: BE3F9CC........
API Key v2: ojdbxi3........
API Secret: y95fkky........
Device Info
Device ID: 001D0A7.....
MY WL.com with IP logger
Account Info
API Token v1: BE3F9CC... same as WLL
API Key v2: ojdbxi3... same as WLL
API Secret: y95fkky... same as WLL
Device Info
Device ID: 001D0AE... different from the WLL
Key: 165...
You will note that the first one does not have a Key number.
Edit: Likely Mattk got it right!
Enjoy,
Paul