I was checking my holiday booking (flying UC to Grenada in November) via check my trip and it appeared I was issued seat 6A and my fiancee had seat 6K, result ! Went back onto site today and the seat allocation has vanished ?| Any thoughts ?
There are no advance seating allocations on any flight in any class after Nov 1st for the time being while VS "upgrade their systems" (or, if various rumours are to be believed, prepare to start charging to request a specific seat).
If the website temporarily showed you having 6A and 6K, it shouldn't have done. But that doesn't mean you won't get them.