Hi @DCBelnap
Thank you for contacting McAfee
McAfee Total Protection family subscription covers more number of devices and for individual subscription it covers single device only. With unlimited devices in the subscription you can install McAfee on all the devices and for activation purpose McAfee registered email need to be added.
This is as per design and after activating Safe Family you need to create child account and provide required access, then install it on child device with child credentials so that you can track all the activities performed by child user on their devices.
Regards
Ganesh Raju R