OK, so I bought the ax 720s, and was inspecting it and i could move the cord that plugged directly into the left ear bud, in and out. I was wondering if that was normal. I could push it in and it would make a sound like it was winding up, and then i could pull it out and use it. The cord didn't completely come out. but i was wondering if it was normal to be able to push the cord in.