I made a VX booking in October, and by the time we flew (March this year), they had migrated to a new reservations system that had kept our VFF numbers, but marked them as Elevate numbers instead of Velocity... On asking the check-in agent at the airport, SWMBO's BP showed 'VA' then her number, but mine also showed her number...
I asked the gate agent to fix it, and they said that they were unable to remove the existing entry but would instead just add a new one - which doesn't seem to have worked... Her points showed up weeks ago, mine, as usual, are missing... another retro claim to make haha!
Also have to say that I wasn't very impressed with VX at all... I'd selected 5A in the hope of boarding first (and therefore having overhead space), but they boarded by row from the rear of the aircraft, and two Asian tourists in 4A&B had no less than EIGHT bags EACH that they were allowed to carry on without question, so there was no space above the seat by the time we got there... combine that with the fact that I placed two food/bev orders via their IFE system, and they both were not delivered despite reminding the crew... Suffice to say I would not return in a hurry - they made United look good by comparison!! Having said that, I'd happy try them ONCE more on my next visit to the US - it's not possible for the next flight to be worse haha!