Very strange PDC problem

[RenaissanceMan]

I am having an intermittent issue in which the PDC activates when turning the key to the 'start' position. Here is how it goes: Turn the key to the acc/on position, everything is fine and PDC is off as normal. Then turn the key further to start the X5, and immediately PDC comes on... This is without taking the car out of 'park' and putting it in reverse, etc. As I said it only happens intermittently, but seems to happen most frequently now when the car is cold. Not sure if this is related, but I have also been having an intermittent issue in which occasionally the car will not start in the 'start' key position until the 2nd try. Could a potentially failing ignition switch cause strange PDC behavior like this?

Thanks-