As always, we go to the JP site:
Quote:
モンスターを倒した際やコンテンツ(※)のクリア時に獲得できるエクゼンプラーポイントの量が2倍になります。
※対象コンテンツ:バトルコンテンツ「桃色輪舞曲」、ビシージ
※累計獲得量50万ポイントまで有効です。
(マスターレベル50に到達した状態ではエクゼンプラーポイントの獲得は発生せず、累計獲得量に影響はありません。)
*2025/02/28表記修正
Google says:
Once you have reached Master Level 50, you will no longer receive Exemplary Points, so there will be no impact on your total points earned.
DeepL:
With the master level of 50 reached, the Exemplar points will not be earned and the cumulative amount earned will not be affected.
Reverso:
Once Master Level 50 is reached, there will be no exempler points scored and cumulative gains will not be affected.
Conclusion:
I dont think this is a bad translation. Its possible it's a dialect thing that doesnt translate word-for-word and a native JP speaker would need to chime in, but it really seems like whoever wrote this up doesnt know the game.