It's not the name per se. Vouchers do not have QFF# attached when created (while credit vouchers associated with "real" bookings obviously do). All one needs do is add QFF# to the booking. Easier said than done without phoning QFF (I tried via the AY site some time back but no go due to the implementaito I think as they are half formed bookings with bonus city pairs inserted if one bothers to look at a raw voucher PNR with checkmytrip and so on).
Also because vouchers can be redeemed under any name there's no point putting the buyer's QFF# in there because vouchers, as intended, are for gifts to other people, not ourselves (though this is obviously a perfectly fine use of them) thus the FF# is not filled on purpose.
(indeed the new voucher booking interface omits inputting the QFF# of the buyer - it used to be there back in the days of 10points/$ chrissy voucher bonuses, but they stopped a few years back)
I just hold a a spreadsheet that maintain with references, values and dates that I update when I buy any. Simples.
The QFF# is the "key" (as we IT database nerds say) to showing in my bookings since you login to your QFF#. Any booking without an associated QFF# entered thus won't show.
Once of course a voucher is converted to a booking with a QFF# attached (or any FF# of course) then they will display accordingly.
We now return you to your anxious wait for DSC postings