The UI is unclear and bluetooth is complicated. I think the "associations" work like this:
- Each phone key --> unlocks the car and can select an associated driver profile.
- Each driver profile --> has seat settings and can select a "preferred bluetooth device" for the purpose of audio streaming, phone calls, text messages, and contacts. That connection requires "bluetooth pairing" to the car.
Supposedly the first phone key to connect determines which driver profile the car will use (not the phone nearest to the driver's door/seat), but this doesn't always work out.
Sometimes these associations get broken, not to mention when you get a new phone. So if it's not working right, do check that both of these associations are set up for your phone, and consider removing that phone as a key and re-adding it.
Tip: If one of you is shorter than the other, you can set that profile to use Easy Entry so the taller spouse doesn't revisit the Star Wars trash compactor every time the car picks the wrong profile.