Yes, you can certainly earn double VFFpoints and VFF SC from your own seat, and the seat next to you under what VFF call it extraseat, while QFF calls it Comfort Seat.
But you must have phoned up VFF and bought the seat next to you, but in the case of the OP, don't know on that one.
In my extraseat situation, got it this past April PER - ADL, but they do not give you another BP for the empty seat next to you though, just that the seat next to you is 99.99% guaranteed yours.
OP, not sure what VA would do if you tried to board with the seat in Y without cancelling it prior to flight, ie, you take the J seat by doing OLCI, and print out the J BP, not sure what will happen when you board, or whether you could print out 2 BP, one in J and one in Y, ie if the system will let 2 people check in with same name and same VFF #.
You could always try and see what happens, if you dare.