@endera said BT was working for him as well but he didn't change anything (as far as I know). Realistically changing the Device ID of the audio device should have no effect on BT although stranger things have happened, I'm just glad its working for you whatever the explanation. I messed around with kext order this morning with no difference, I may try it again and change the wifi kext back to itlwm and see if that helps.
FYI, I tried ID 8 of audio and all that is recognized is the head phone port on the front so that's no good for me. After supporting this thread for a while we have been through what ID works best for sound, I was using 1 originally but 3 ended up working best for what seemed like everyone else.