I accidentally signed for for series 4 and 5 twice!
I looked at my profile a few weeks ago and saw that the last numbered star had a 3 in it, so figured my membership expired with the third series. When I renewed for 4 and 5, I realized I had already done this a month and a half earlier. :/
Wrote an e-mail, and got a very nice note back from Cap'n John saying they're not necessarily going to have the numbers for every series in the little membership stars anymore. He said they were still thinking out what to do instead.
From now on, if I'm not sure, I'll click on "My Account" instead of "My Profile" and see what I've already bought.
Anne in Vancouver, Canada