Could be remnants of wifi+cellular option that was in the iOS 6 beta. I've noticed some podcast apps (like iCatcher) have an option to allow simultaneous downloads, up to 3 podcasts at a time, 2 on wifi, one on cellular. so, the coding is there for the iPhone to do multi downloads.
Apple: your holding it wrong.. no wait that was the antenna issue. Your holding it wrong... no wait wait... that was the camera with a purple hue... AH! Your wifi doesn't work because your holding it wrong.. there its your fault, not Apples.
Oh and the "bug" is a feature that helps ATT rack up the $$$$$ and make there data tiers so profitable. ATT + APPLE = team work to screw over the blind Isheep