No idea on the case officer question...no one else ever seems to say either. I'm not even sure how useful logging in to check the status is either to be honest. It seems to be that once people get their visas approved they disappear, and we are left with our unanswered questions haha.
My timeline...
nomination approved already (did it separately)
Application submitted decision ready by MA 17/6/13
CO??
grant??
Mine says in progress too, has done for weeks. I don't think that means anything.