Ok so when ever i go to use my iphone to play audio via BT for the ipod feature

once i turn the ipod on and turns the Volum on the iphone all the way down

 

it does not do this when im only using it for phone it only turns the volume all the way down on the device ipod iphone iteself when i synch for Music

 

anyone els having this issue

i seemed to remember there was a issue like this going on once before

 

anyone figure out what it is ?