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Thanks, I have been unable to get out to the site where I need to test this. Once I do I will update the posting with my results.
I have been down the road of NAT Reflection in the Adtran routers many times. I worked through my sales channel to try and get it in as a feature request. Last I spoke to them, while it was presented to the development team, it seemed that it wasn't going to be a feature added anytime soon.
Either setting up separate networks and using NAT between them or using an FQDN and host entries is the only real 'fix'. But its really a work around.
I finally made it to where I could attend to this issue.... I went with vmaxdawg05's original suggestion of the domain and the hostname entries. It works but I do agree with petersjncv that it feels like a workaround.