Handling cluster clicks when two computers on network connected to LAN and Flex?

I have added a second computer to the shack . When both computers are in operation I often have 3 slices/pandapters open. All works as desired except when I click on a DX cluster spot on computer A, the slice on computer B goes to that frequency. Not computer A. If I click on a spot that is on computer B, the open slice on computer B QSYs., just as desired. Any ideas how I can get Computer A to work where clicked-on spots perform the task on computer A?

FYI : Computer A runs SmartSDR for Mac OS with MacLoggerDX and Computer B runs SmartSDR for Windows with Dxlab's Spotcollector.

Computers connected to 6600 via LAN.

Andy K3UK