Until recently I had a number of Sonos devices but only one of them was Airplay compatible. All devices are always grouped as Everywhere. When I play sound on an Apple Ipad it would automatically be distributed to all Sonos devices. This is great. Sonos is ecouraging owners to trade up to newer devices that are Airplay compatible. So I now have 3 Sonos devices which are Airplay compatible. But now when I connect to the same Airplay device that I previously did the sound is no longer passed to all devices. The 2 new Airplay devices are removed from the Everywhere group. Why is this happening and how do I stop this? I just want all the devices to be in one group.