I did a DNS Lookup on your site and got back
Domain Type Class TTL Answer
guidebazaar.com. A IN 14400 69.65.111.11
guidebazaar.com. NS IN 86400 ns2.keepitsecure.net.
guidebazaar.com. NS IN 86400 ns1.keepitsecure.net.
ns2.keepitsecure.net. A IN 23692 69.65.126.246
Keepitsecure is the DNS domain they handle your name space. As you can see they have multiple servers which means they havent been able to update all of their servers yet which in turn COMCAST has not been able to update their servers either.
Here is COMCAST DNS Lookup:
Domain Type Class TTL Answer
comcast.com. A IN 300 69.48.228.103
comcast.com. NS IN 86400 ns1-auth.sprintlink.net.
comcast.com. NS IN 86400 ns2-auth.sprintlink.net.
comcast.com. NS IN 86400 ns3-auth.sprintlink.net.
ns1-auth.sprintlink.net. A IN 86400 206.228.179.10
ns2-auth.sprintlink.net. A IN 86400 144.228.254.10
ns3-auth.sprintlink.net. A IN 86400 144.228.255.10
Chances are they do not have your websites new DNS server in their list. If you notice COMCAST does not have a DNS server.