OK, if the icon is there that is a good thing. There would be no icon if you didn't select deploy.
Its not terribly obvious when first installing a second host that it needs the deploy part set.
There's something else causing the engine migration to fail. You can dig through the logs on the engine and hosts.
I would look next at the underlying storage for the ovirt-engine image to see if it got bit by the bug that leaves it owned by root and not vdsm:kvm.
That prevented me from migrating engine to properly deployed nodes when upgrading to 4.3
On one of the hosts, follow the path /rhev/data-center/mnt/* to "ls -l" the images directory for your hosted-storage and check the ownership.
If its owned by root and not vdsm:kvm then chown it to that (aka 36:36) and try migrating again.