Assigning Devices to Profiles

Hello

I've assigned all the devices in my family to the appropriate User Profile however they are not saving.

I've tried several days in a row and each day the devices show up as Unassigned.

Why are they not saving to the profile?

I follow the process and get the Green Check Mark indicating it's done but then they don't save.

I'd like to get everything organized so hoping someone has an answer.

Thanks!