correcting an error found with DNSreport

[Ben Keepper]

Greetings,

I am trying to correct an error I am getting when I run DNSreport against
one of our domains.

the domain is sandicor.com and the error is:

"WARNING: Your SOA (Start of Authority) record states that your master
(primary) name server is: dns1.sandicor.. However, that server is not
listed at the root servers as one of your NS records! 
This is probably legal, but you should be sure that you know what you
are doing."

We called Verisign, and they said everything looked correct.

I know the warning says this is legal, but we are having flaky DNS issues
with some ISP's not able to find hosts within our domain.

Any thoughts?

Ben