I set up an Octopress blog on Github Pages at myusername.github.com. I now want blog.myusername.me (which currently has a Wordpress blog set up) to point to this Octopress blog.

So I followed the instructions here on setting up a custom domain:

• I ran echo 'blog.myusername.me' >> source/CNAME in my Octopress repository, and then ran rake generate and rake deploy to deploy it to Github.
• I went to Namecheap, and added a new CNAME under my myusername.me domain: "blog -> myusername.github.com -> CNAME".
• Waited a couple hours.

However, now when I go to myusername.github.com, it redirects me to blog.myusername.me (which is my old Wordpress blog), which seems like the inverse of what I want. (Going to blog.myusername.me directly still shows my Wordpress blog.)

I checked http://www.whatsmydns.net/#CNAME/blog.myusername.me and it seems like my DNS has propagated (myusername.github.com shows up in the right-hand side).

Any ideas what I'm doing wrong?