Sorry that it took a bit to get back to you. I saw this right as I was going out the door last night.
If you haven't yet, try doing a forced reload of the Stats page. That worked for me. The loading timed out the first time I viewed the page and then it came up when I did the reload.
I believe the Supporter program is a subscription and it bills automatically. If you log into your Paypal account, you should see mention of the subscription. There should be a cancel link there as well if needed. James or Sue are going to have to answer that one though officially.
I seem to be having touble accessing stats. The page says "Done" but it is empty.
Will I be notified when I have to pay for another year as a Supporter?