Actually, Classic Monsters isn't showing up at all, although I do have a subscription to it. Did I mess up when setting up the Chronicles sub?
Hmmm... It looks like your addresses for the two subscriptions are marginally different, which makes them appear as two totally separate addresses to our system. This nixed your ship together request.
I've fixed the problem, and combined your items to ship together. A new confirmation email should be hitting your inbox soon!