I'd leave it alone and be more careful next time. Since you're someone who flys quite a lot, I'm surprised you weren't very clear about how much of a VDB voucher you were expecting before this all took place. Having done so would have avoided this entirely.
As it is, they did make an error, but you and I both know there's far more to go back and fix only minutes before the flight is due to leave, and it would have been a complete mess for several folks. Others here are sure to disagree with me, but that's the beauty of this forum.