Jensen is correct. This achievement counts previous wins since the release of the achievement.

https://subeta.net/games/battle/stats.php?view=opponent&id=67&userid=9091 https://subeta.net/games/battle/stats.php?view=opponent&id=65&userid=9091 https://subeta.net/games/battle/stats.php?view=opponent&id=66&userid=9091

Here are your stats for the 3 boppers you mentioned. It is possible that you just don't remember. But this shows that you have 25, 20, and 25 wins respectively.

If you file a ticket, a UA can look into it.