Looking at the log messages Ithink there is still an issue here.
2016-01-08 10:39:26 system crit 00015 Peer device 285184 in the Virtual Security Device group 0 changed state from init to primary backup.
The state of primary backup instead of just "backup" does not appear to be normal operations and might be the cause of the alarm. I didn't notice this till you posted that other message and I believe these kb are the ones to check.
http://kb.juniper.net/InfoCenter/index?page=content&id=KB7726
This asks to confirm that the HA probe is not set.
I would also check that your configurations are in sync
http://kb.juniper.net/InfoCenter/index?page=conten