DNS propagation takes up to 72 hours to complete, 18 hours is not nearly enough for the propagation, sometimes you will get quicker results, sometimes probably not.
What you can do in case your computer caches old sites is clear your cache and do flushdns, also resetting your internet wouldn't hurt.
With that said, I noticed that redz.us is using custom nameservers. Upon a server move, custom nameservers will not work until A-record is added again on the server. redz, you will most likely need to modify your ns1 & ns2 at your registrar first then probably contact pivotal to have him add A-record to your account. Until those steps are taken, you'll probably experience downtime for a bit more.