Type of Aircraft

Hi, i am booked to travel from LHR to JFK on VS45 at the end of Sept and the aircraft has been showing as a 747 on MMB since i booked back in Dec. However, my return on the VS16 from MCO in early Oct has never shown any aircraft type and i was wondering if this is normal until nearer the date of departure. I have checked on the "which aircraft" section on vflyer, which says it is usually a LGW 747, so assume this may be the case, but wondered why no aircraft type has ever shown on MMB?

Vs 15/16 is always a LGW 744

This is a long-standing issue, I think - presumably an IT bug. I've got a return sector coming up that won't display the type even though it has been assigned and seats are selected etc.

Thanks folks, I suspected as much. I upgraded an M to UC on my outbound, but only managed as far as PE on the return. I have been and will continue looking each day, but from reading the many posts on here, I realise it won't be easy getting two G's from MCO.