I was expecting to see an option that simply updates my season ticket - but then I remembered upgrading my sons ST to an adult ticket for the first game of the season and having all sorts of aggro at the turnstile because the card didn't work, only to be sent to the ticket office and was told...
They must have sorted the problems out by the time you logged in because it was a bloody nightmare first thing this morning ! Got mine after repeatedly logging out and back in before my reserved tickets were visible.