Edit: looks like it’s been fixed
as you probably know, the October mission “Hero of the Day” was NOT fixed with today’s reset. The only thing that changed is that there’s now an official post claiming it will be fixed to count the damage in the future and not the XP. You know, “when it’s done it’s done”.
I had a look at how it is on the US server, that reported the same problem. Strangely enough it was confirmed by The_Chieftain that US server mission coding is correct (it has just wrong description), while on EU server both the coding and description are wrong. EU quality and all that.
However, a word of advice: despite what WG EU representatives claim, it’s VERY likely that no damage you deal today will count towards the goal if it gets fixed, so, unless you really want to grind 50k XP, I wouldn’t really bother.