[Zaphod-Beeblebrox]

I've been having a strange issue(s) or at least something different than what I expect in handling incoming call-waiting calls. If I'm already talking to someone and a call comes in, I hit the answer button. This connects me to the new caller for just a second or two, then puts them on 'hold' and takes me back to the original caller. Hitting the button again will take me back to the second caller. it creates a lot of confusion for me as to just who I am talking to.
Also, when I answer a call and I have my Bluetooth headset on (most of the time), I often (but not always) see the native WinMo volume slider pop up for a second.
Any ideas?