domain name system - Created A record for subdomain; DNS not updating/propagating?

I am having the worst time with GoDaddy and DNS propagation. I have created an A record under my domain name in the Zone File, and pointed it at the hosting package located under my GoDaddy account. The domain name is countdownevents.com. The A record I have created is called "blog". In short, I want blog.countdownevents.com to point towards my newly purchased hosting package.

I have never had DNS propagation take more than a couple of hours to start taking effect. In this case, it's been almost 48 hours and it doesn't appear as though the change is taking place at all (see whatsmydns.net; not a single server shows the new IP address I want to be pointing to, which starts with "107").

Does anyone know why this might be? Every other A record I've created is working seamlessly, and GoDaddy keeps giving me the "Well technically it hasn't been a full 2 days..." run around O_O, and I know something is obviously wrong.

Any idea what that might be?

A Record for countdownevents.com is:

@ 600 IN A 184.168.47.225

A Record for blog.countdownevents.com is:

blog 3600 IN A 107.180.3.91

Note: Name servers (NS records) for countdownevents.com also point towards GoDaddy's dns servers.

See photo: http://mattermedia.ca/zonecap.png

Answer

It seems that you have created an additional zone for your blog.countdownevents.com. since it has independent SOA and NS records:

;; QUESTION SECTION:
;blog.countdownevents.com.      IN      SOA

;; ANSWER SECTION:
blog.countdownevents.com. 3600  IN      SOA     ns15.domaincontrol.com.
                                                dns.jomax.net. 2015041701
                                                28800 7200 604800 600
;; AUTHORITY SECTION:
blog.countdownevents.com. 3431  IN      NS      ns16.domaincontrol.com.
blog.countdownevents.com. 3431  IN      NS      ns15.domaincontrol.com.

Therefore you should either remove the additional zone to make the record from zone countdownevents.com. to become usable or add new @ IN A record to your additional blog.countdownevents.com. zone.