It took you 2 days to notice?! :P
Actually -- DNS server IP's (ns1.blitzbasic.com and ns2.blitzbasic.com in this case) have to be registered explicitely with the rootservers. Any modification to the IP of a DNS server itself can take up to 48 hours to propagate across the rootservers.
So... 2 days until a fix is typical rather than unusual. :-?