You have a routing issue.
set route source 192.168.1.0/24 interface ethernet0/3 gateway 68.179.20.150 preference 50
set route source 192.168.1.0/24 interface ethernet0/2 gateway 184.69.6.121 preference 20
Source routing has presidence over destination routing. You would need to remove these source routes from the SSG-320.