Not sure this will help much, but here is what I do on my 2013.
I plug my IPhone cable into the USB port in the trunk, I can play recorded music I have on the phone or listen to PANDORA, provided PANDORA is playing on the phone when I plug it in. I have a BLUETOOTH enabled GPS that handshakes with my phone and the bike's intercom system and I use it through the intercom system for getting routing info or phone calls if needed.
The USB port in the trunk works off of the AUX selection button on the left hand console of the audio system control panel, make sure you have the AUX option selected it will show on the info screen, on mine if I am using just a flash drive, with recorded music, plugged into the USB port, I have to press the AUX button twice to bring the flash drive up, then it works like it was a CD player. Maybe the BLUETOOTH adapter you are using requires two pushes also?
Not sure this helps, but I hope it does a little bit.
Florida Prowler # 46250
The Lord said; "Thou shalt have dominion over all of the animals, except of course the cat."
My therapist's name is Dr. Goldwing, she has the antidote for the blues.