My guess is, it has not gone through yet since you have only made 2 posts. If you had donator status, even for 5 minutes, you most certainly would have made more than 2 posts since you need to post in order to unlock donator passes.

Do you have a message in your inbox stating that you are now a donator? You should. If so, send that to Spartacus and he will straiten things out for you.