Sync problem with multiple systems

Sonos software is brilliantly capable of using the system in a eased way but still when I sync with one and try to use my iPhone to control the Sonos system in our properties in different cities also equipped with Sonos, I have to re-configure the software to sync with that other system, hope this problem will be fixed in the next update

buzzinfrog about Sonos S1 Controller, v4.2