Hi, configuration will only be synced after you do "write memory" or hit the "Save Configuration" button in the GUI. "show switches" on the master controller will show you if the IPsec link between the two controllers is up and also if it syncs.
I don't have a redundant setup in my lab but this is what you should see (in your case 2 switches)
(Aruba7005) #show switches
All Switches
------------
IP Address Name Location Type Model Version Status Configuration State Config Sync Time (sec) Config ID
---------- ---- -------- ---- ----- ------- ------ ------------------- ---------------------- ---------
192.168.1.253 Aruba7005 Top Naeffstraat 25 Gorinchem master Aruba7005 6.4.4.6_54633 up UPDATE SUCCESSFUL 0 175
Total Switches:1