I have a domain and a blog subdomain (to get around the email problem). Options > Domains says my domain is redirecting to my blog subdomain (good). But it's not, actually.
If you want to test it, my domain is neportlandlawyer.com. My blog subdomain is set to neportlandlawyer.wordpress.com. My www is set to blog.neportlandlawyer.com.
I have a feeling there's an easy answer to this.