NS records at the parent servers are:
ns2.betahost.com
ns1.betahost.com
NS records at your nameservers are:
ns1.hitfarm.com
ns2.hitfarm.com
Does the above ring any bells. Looks like a case of an update to nameservers not completing, or perhaps still happening. How long ago did you update them? Go into your account and check carefully what you have set up there. If it seems correct, and all this happened quite some time ago, re-enter and resubmit the nameservers you want just to be on the safe side.