Thanks. Figured as much.
I think where we are is deciding if we want to buy 1 AP and have the discounts available to us, or buy the season passes for all 4 of us and have the option of the extra evening in the park.
I'm also looking into Undercover Tourist and Mousesavers, although, buying from anyone other than Universal always makes me a bit nervous. (I just don't really know anything about them.)