YEAH, it's weird!

So I got this 60gb 5g ipod a couple of months ago and when I was in my car and the phone rang the sound turn down. I thought, hmm, that's a new feature. Well it has gotten worse. Now when the phone rings the sound goes all over the place. THe volume actually turns up and down like crazy. I took it into the apple store and the guy at the genius bar looked at it like it was posessed. They swapped it out for a new one. Wierd huh? Anybody else have this happen? Put your cellphone next to your ipod while its playing then call it.

My phone is the SLVR ipod Moto.