First, take a day off, Ha Ha, funny but glad someone gets those things.
Second, I found the answer I needed to explain the difference between Free and Custom and I assume this is how the NAS works the difference...
Free uses the name server: members.dyndns.org
Custom uses the following name servers and the first two are required to be used: ns1.mydyndns.org, ns2.mydyndns.org, ns3.mydyndns.org, ns4.mydyndns.org, and ns5.mydyndns.org
This should clear it up if anyone else was wondering and if someone finds out I'm incorrect, please post the correction. This is just what I found on DnyDns.org and doesn't mean the NAS actually implemented this but I suspect it does since someone took the time to add it in the first place.
-Joe