app starts playing when headphones are unplugged

actually i think it's removing it from the dock that triggers it, not the headphones or sleeptimer. yesterday i had xiialive playing in my car when i got home from work, i unplugged the headphone jack (which stops the playback) came inside, and put my phone on the dock since the battery was low. I never unlocked it, so xiialive was the current active app all night. i didn't listen to any music or use the sleeptimer last night, and when i pulled the phone off the dock this morning, it started blaring the station i had playing last in the car from yesterday.