Dension Gateway 500s BT multiple issues

[sapstar]

I got a Dension 500s BT fitted today. I am having the below problems.

1. My phone book from an Acer Liquid E2 Duo phone (Android 4.2.1) doesn't copy to the car.
2. Sometimes the bluetooth doesn't connect automatically to Dension, when I enter the car.
3. The system seems to reset when ignition turned to ON position. Music playback stops for a minute or 2 and starts playing first song in the current album again. Bluetooth disconnects.
4. Blue light on the module doesn't turn off when the car is off.
5. Everytime after disconnected from a call, the Audio volume goes very high.

Can someone who had this setup help me with these issues?

Additionally I have cracking noice on bluetooth sometimes, which is not bothering me that much right now.