Yeah, that's what I deduced. As far as I can tell, when I upgraded to V2 of the CA backup, either I forgot to update the settings or the upgrade did not copy the settings. Either way, a lesson has been learned.
I'm embarrassed to admit it but I fully don't understand how the cache drive works. I assume I am to configure the V2 CA backup against /mnt/cache/appdata? Originally, I think it was against /mnt/user/appdata.
Should I be configuring the docker apps to store in /mnt/cache/appdata? I had them configured to /mnt/user/appdata.
Overall, my assumption was the cache drive would move data in and out as needed, thus I shouldn't set configurations directly against it.