I've had various techs look at this but nobody can find the error - I'm hoping someone here has come across the problem before.

We make use of the clustered DNS, however it seems each nameserver has two IPs assigned?

When doing a DNS lookup, the following is shown -

Code:
ns6.thewebhostserver.com  ['91.204.209.1', '174.37.60.9']   [TTL=86400]
ns1.thewebhostserver.com  ['193.33.186.111', '91.204.209.1']   [TTL=86400]
ns2.thewebhostserver.com  ['193.33.186.112', '91.204.209.30']   [TTL=86400]
ns3.thewebhostserver.com  ['91.204.209.1', '91.204.209.2']   [TTL=86400]
ns4.thewebhostserver.com  ['91.204.209.2', '91.204.209.31']   [TTL=86400]
ns5.thewebhostserver.com  ['91.204.209.1', '67.228.177.225']   [TTL=86400]
I also get a 'Same Glue' error (repeated for each nameserver) -

Code:
For ns1.thewebhostserver.com the parent reported: ['91.204.209.31'] and your nameservers reported: ['193.33.186.111', '91.204.209.1']
Any ideas what's happening? Everything looks to be setup correctly.

Thanks,

Dan