i jsut did the bilby quest (actually still logged in) and when i got the "reward" at the top of the manor, i got a double quest update. two journal entries depicting how awesome i am... okay, maybe i am not that awesome.. but i did get two journal updates after i grabbed the "prize" both of which said the same thing, along with a blank journal entry

and when i returned to bilby.. he did not take the key.. AND my journal did not update to say teh quest was complete