So I got logged out yesterday, as I suspect everyone did, but unlike everyone else my password no longer worked. And for whatever reason, the password reset form was just reloading and not actually changing my password. So I contacted the support team, and after I went to bed, because Poland, they resolved matters.
So of course now that I can log in again, Dragonsphere is showing as updated. Admittedly, that might be yesterday, and because i didn't log in it didn't clear it, but I'm getting the impression from this thread it's not.
... it occurs to me that this thing might be an attempt to fulfill my wish I posted that the shelf should always display the number of games you have, which it is unquestionably doing now.