DNS Propogation seems to have stalled.

Recently I transferred over several domain names to AWS, verified my ownership of them set up the Hosted zones and updated the records for them. Specifically, for the one I am having the trouble with, I updated the NS records to reflect the info now assigned by amazon, and added an A record for a sub domain as well as several CNAME records. The issue I am having is that, for reasons unclear to me, this domains propagation seems to have stalled. To be clear on DNS checker I am receiving positive results for about half the map, but 13 remain, stubbornly, red x's and it has been well over 72 hours. Additionally with the dig command in terminal i am getting a SERVFAIL. This is in contrast to the other domain i moved over which did propagate. The fact that half the map has propagated successfully has me baffled as it suggests I set up the records correctly (otherwise you would expect 100% failure, right) but it is as if the system just stopped propagating. Oh and the TTL is set to between 10 and 5 minutes for the different records, so that shouldn't be the problem. If anyone can assist me in resolving this, it would be much appreciated. The domain address in question is sorcerism.com and the subdomain is db.sorcerism.com.