Hi Michael,
I am glad that you got it working at last.
As for the bonding configuration, to avoid misconfiguration, I would have restore a backup to another machine and configure the bonding manually to see its implications through the network settings module in the Freepbx. Just make sure you have a console connection to the backup server before configuring the bonding.
You can read a little about network bonding in Centos 6.6 here (read this manual to its end before configuring):
http://www.paulmellors.net/centos-6-6-network-bonding/
Thank you,
Daniel Friedman
Trixton LTD.