Why is the wrong name server information at crsnic.net & gtld-servers.net?

Did I screw this up? I don’t even know how this might have happened, so I’d like to learn. I’m trying out HostGator’s reseller service and I bought a domain name through it, but I didn’t want the default name servers and so I changed them during the registration. After registration the domain name record is correct everywhere except at whois-servers.net and whois.crsnic.net and it looks like the DNS network is using that same information.

$ whois -h whois.enom.com. example.com
...
Name Servers:
   dns1.name-services.com
   dns2.name-services.com
   dns3.name-services.com
   dns4.name-services.com
   dns5.name-services.com

...
$ whois -h whois.crsnic.net. example.com
   Domain Name: EXAMPLE.COM
   Registrar: ENOM, INC.
   Whois Server: whois.enom.com
   Referral URL: http://www.enom.com
   Name Server: NS1.HOSTGATOR.COM
   Name Server: NS2.HOSTGATOR.COM
   Status: clientTransferProhibited
   Updated Date: 01-jun-2010

   Creation Date: 31-may-2010
   Expiration Date: 31-may-2011

>>> Last update of whois database: Tue, 01 Jun 2010 19:20:47 UTC <<<
...
    $ dig +norecurse @b.gtld-servers.net. example.com. NS
...
;; AUTHORITY SECTION:
example.com.      172763  IN      NS      ns2.hostgator.com.
example.com.      172763  IN      NS      ns1.hostgator.com.

...

My next step is to let HostGator have a look, but first I want to better understand how this happened.

Thanks.

Answer

I would contact the registrar to ensure they actually pushed the change out to the root DNS servers and have the correct information on file. I haven't used HostGator specifically, but some of the registrar APIs that I've had to talk to in the past have been.... glitchy.