I'm using my iphone and i have headphones connected to it, now the problem is while I play a song as i talk on the phone i'll press the home button twice to open the ipod menu. On the menu instead of the standard ipod volume controls there is a bluetooth symbol off to the side and a volume meter that doesn't seem to do anything. i don't have bluetooth even on! and i can only listen to the song at half volume. is this normal? any help would be great.