I can confirm your observation.
However, your fix only seems to work until the next reboot.
If your commands are run again, BackupPC will once again run (!).
At this stage, I'm not too fussed, as I rarely need to reboot ClearOS.
However, it is good engineering design a server doesn't need skilled intervention to start it correctly, so this needs to be eventually fixed.
I also found the Main Configuration Editor had errors:
Error: No save due to errors
Error: Bzip2Path must be a valid executable path
The open a command window (as root) and run the following commands:
Errors go away.
Looks like the installer needs to be fixed and the dependencies updated to include bzip2.