HA Conifguration on FortiVM?

Hi, I am trying to get 2 FortiVM appliances (latest version) running as HA Active-Active as lab on top of vmware esxi 5.5. However doesnot seem like it is working. I followed handbook with just basic configuration on the virtual appliances but after two vm rebooted, both VM are claiming to be the master (from get system status output)...I login to the cluster but it seems like it is VM1 first time and then later refresh as VM2. It seems like VM2 overtakes VM1 as master while VM1 doesnot want to give up but keep sending G-ARP...Plus under the HA page on Web UI, I only see one unit. Another thing I notices during troubleshooting, both VM have serial number FGVMEV0000000000. Will that cause issue? HA is supported on FortiVM, right?

Here attached are the HA configuration and running status of two VMs (rest of the config are Factory default+basic VDOM). Please let me know where I configured wrong...

On VM1:

FortiGate-VM1 (global) # show system ha config system ha     set group-name "LAB-HA-Group"     set mode a-a     set password ENC O9BYGKJnJr     set hbdev "port3" 50     set override enable end

FortiGate-VM1 (global) # get system ha status Model: FortiGate-VM64 Mode: a-a Group: 0 Debug: 0 ses_pickup: disable load_balance: disable load_balance_udp: disable schedule: Round robin. upgrade_mode: unset Master:128 FortiGate-VM1    FGVMEV0000000000 0 number of vcluster: 1 vcluster 1: work 169.254.0.1 Master:0 FGVMEV0000000000

On VM2:

FortiGate-VM2 (global) # show system ha config system ha     set group-name "LAB-HA-Group"     set mode a-a     set password ENC O9BYGKJnJr     set hbdev "port3" 50     set override enable     set priority 100 end

FortiGate-VM2 (global) # get system ha status Model: FortiGate-VM64 Mode: a-a Group: 0 Debug: 0 ses_pickup: disable load_balance: disable load_balance_udp: disable schedule: Round robin. upgrade_mode: unset Master:100 FortiGate-VM2    FGVMEV0000000000 0 number of vcluster: 1 vcluster 1: work 169.254.0.1 Master:0 FGVMEV0000000000