Is there a way to set two SBs to sync power just between each other and not when another SB in the same "sync set" is powered on or off?

I got several SBs around the house, all synced (not power), and this works great as I move around the house just turning on or off players as needed. The problem now is that I got a Touch in the living room, its a nice gadget but the low readability and lack of lazy search makes it pretty useless to operate from distance, so I placed a SB3 in the same room and set them up to sync power. Worked great until I turned off another SB somewhere and they of course died too...

I run a local SBS on a linux box btw.