The Auto Sync described may or may not sync what you desire. Far better, far more control, select the image you desire. Use the key commands to bring up the Copy (and then paste) Copy Settings dialog seen below. Configure as desired (below, ONLY WB is selected, you can of course pick other attributes).
Command (Control on Win) C key to copy, Command (Control) P for paste. NOW you know exactly what's getting the sync'ed settings.
Also consider saving that WB as a preset for the future....