OK, just making sure I read everything correctly:
You get into your CAR for a 2 hour commute, listen to your music with HEADPHONES on, READ your SMS messages, and dictate responses to them?????
Please tell me what roads you drive so I know what one to avoid.
lol...thanks for the constructive input!
I can also tie my shoes and have a conversation at the same time (which I know can be a challenge for some).
JSYK, In a number of states, listening to music with headphones on is illegal while driving. At least California, Louisiana, Minnesota, Massachusetts, and Pennsylvania that I can find quickly. It's dangerous to drive distracted, and earpieces can very easily block out important sounds, like sirens and screaming pedestrians. However, all states issue licenses to the completely deaf - but deaf people are used to relying on their other senses for safety.
But back to your actual issue - It seems like the droid mutes the music to listen to the mic for the purpose of not getting a loopback like was already suggested. For one, motorola probably just didn't bother to make a special case for earpieces, so they fall into the same programming as the built-in mic and speaker. For two, there's no way to tell if the item you plug in is a headphone or huge external speakers - they are electrically the same.