MN700 restore DNS server issue

I notice after I configured my MN700 base station and
backed up its setting because I had 4 more units I wanted
to confiure the same way. After I restoring the saved file
to a new MN700 the DNS server information changed from
automatically to manualy with the IP addresses of the DNS
servers learned from the first MN700. This would have
created problems if I han't notice because the DNS servers
the first unit learned we internal with privet IP.

Has any one else run int this Issue?