Passat (B6) :: Key Hard To Remove When Shutting Off The Engine?

Ok I've had this issue since picking up the vehicle back in January. it has gotten worse over the last few weeks. When shutting off the engine and trying to remove the key, I have to wiggle it around in the slot before it would come out. Sometimes I have to push it back in (which starts the engine again) a couple of times before it will come out.

On my previous passat, and on my wife's passat, I simply press it in to shut off the engine, and the key just pops out. no force needed. This only happens after the car has been driving around a little bit. (i.e. if I just start the engine then shut it off without driving it around, the key pops out easily). Local dealer says its normal. If this is normal, then my other two passats are then abnormal?