Default music app randomly turns on- Related to headset jack?

[jmw]

I'll be listening to Pandora with my wired stereo headset (Shure I2C-M Stereo Mobile Headset) and if my headset jack gets bumped the default music app starts playing in addition to pandora. Also, when I want to use the shure headset for hands free calling and I plug the headset jack into the phone the default music app will play. It is driving me crazy. Hopefully, someone will chime in with a solution???

Phone Info:
Droid 1st Gen
Froyo 2.2