When you said "seems bookable but is not online", does it mean that the website may show availability, but if I try to book it, the system will simply not allow the booking to go through?
Also in terms of Aeroplan redemptions, if I end up making a booking on any available flight now, say, the Air China flight, and then if Lufthansa do end up releasing their flights and I want to make any change, do I have to call Aeroplan to make the change and pay the change fee (and I assume any additional points required if applicable)?