Originally Posted by Hokiehall
but I am just curious if anyone else has had this problem.
Yes, it's been discussed here before.
The AUX jack has contacts that automatically switch the input when something is plugged in there. Those contacts sometimes get dirty or weak. Sometimes just sticking a plug into the jack a few times will "clean" it and stop the phantom switches.
Alas, if the dealer admits there is a problem, their only solution often is to replace the whole radio. Sad but if you're under warranty, I guess you won't care.