I will try that, but I'm not convinced it will work
I don't think it is entirely intuitive ...
Change the PROFILE as appropriate
Then go to LOCKS
The list of KeyCards, Fobs, Phones will display
Press the "Person Icon" for the one you want to set. It is changed (no confirmation) to the currently selected Profile.
So basically Select Profile THEN set the Key to that profile.
Not in the car, so this from memory, hopefully got the right pointers