I guess I have to assume that both of my PRG (PRG0 & PRG1) files have the 6.0??
I'm dying to get this sorted out once and for all.
Sounds like it. Did you install 6.0 more than once?I don't know how that could happen. I didn't think it would do anything if the version is the same, but maybe not.
I highly recommend backing up everything at USER and below. Use an 8GB SD. Just select USER and Copy, then go to the SD and Paste.
This is both as a precaution and to allow easier comparisons to the files.
BTW, are you initiating the BT pairing from the headunit or the phone? In one case you make the phone discoverable and look for it from the headunit BT settings menu. But you can also do it the other way. IDK if it makes a difference, but worth a try. I had similar issues a few years ago but I don't remember what fixed it. But I still always let the HU boot and connect to the phone before using any BT audio or Pandora app. That always seemed to work.
BTW, both the HU and the phone have settings for BT audio and phone. Make sure they are both ON on both sides..