DjShadow: Xtra took their time to update their DNS, but working finally
Because Xtra didn't have to update their DNS. They cached the entry for as long as they were told to originally by the authoritative server for geekzone.co.nz Once that entry expired, they then requested the address again and updated the cache with the new information, again for as long as the authoritative server for geekzone.co.nz said.
Sorry to nitpick, but it's my pet peeve that people think "DNS Propagates" or similar.
Tim