The netmask is 255.255.254.0 for all of them. The network is 192.168.0.0/23. There is no duplicate that I am aware of.
192.168.1.129 and 192.168.1.123 are the OA (standby or active depending on who lost connection last)
192.168.0.200 is the virtual machine connecting through VCSU or the Web GUI.