You can ask other people who were attentive at that time to the behan set, they will confirm that I am right. It was changed during the event on live servers.
Furthermore, I find it misleading to post only the set bonus in the official announcement with the final sets, because the set bonus is exactly the same as before, identical, 1: 1, you can check the thread from 3 weeks ago in which feedback was requested, the set bonus is identical with the one from the official announcement. How to change only individual bonuses without announcing? Regardless of whether you did it on the day of the implementation of the event on normal servers, the individual bonuses should have been mentioned, let the world know. So, everyone saw the same set bonus, they assumed that the other bonuses remained the same. That is, if you are right, it is also very possible that they changed them a few days after their implementation on normal servers.