Do you have the same GV number defined on all your phones? It looks like the call is coming in from GV on SP1, not from OBiTalk and routed to the attached phone. You need to prevent GV from routing the call. Set the X_InboundCallRoute on SP1 to {}
Did you make the change I posted above? It won't work without the change. When you don't include the parentheses, you are defining a literal and are checking for 9 x's.
You potentially have another problem. I'm assuming with 13 phones you will have several simultaneous calls. My 1032 defaults to a max of 4 sessions on the SP Service and 2 on OBiTalk Service. If you reach these limits, any subsequent call will fail. You need to increase these settings. The parm is MaxSessions. I don't know if there is a limit on the size of MaxSessions.