That's strange. I know in my car depending on where I initiate the call from determines which way the audio is sent, even the order of connection seems to effect it. I have a docking aux cable, a Bluetooth speakerphone, and a Bluetooth headset that I used. If I connect the dock last all audio, podcasts and music will go through it. If I connect the Bluetooth speakerphone last it seems to "steal" the audio and stream through it. My headset seems to always fall into a slave mode. When I receive a call if I hit answer on the phone it will direct the call to the Bluetooth speakerphone, if I want to use the headset I have to either Press the headset to answer or use the "switch audio" button on the call screen. Very confusing but it works abd rarely has it ever disconnected completely.
I have read recently that some newer headset like the Plantronics Voyager Legend just do not like the iphone for whatever reason, maybe it's a case like that?
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