I'm having this very same issue:
I subscribed, and I got my confirmation email, but I still don't see my new subscriber features.
If your subscriber status didn't refresh for some reason, you can refresh it manually with the button on your Account Settings page.
When I click the Account settings, and go to Patron tab, and update it, I'm still shown me as "Inactive"
My Paid Subscription is working on Zam's, and Wow-interface, but is just refusing to work on Wowhead, and to tell you the truth, Wowhead is the reason I paid for the year... lol. Is there any help out there for me? and I'll be damned if I still have these **** Captra's Crap...
P.S. yes, I did Log completely out, waited 5 - 10 minutes, than loged back in, and still no Joy.