Hello everyone,
Unfortunately I don't have any screenshot as I realized just after, but basically this is what happened:
I completed quest #71.
Made a reset then went to get reward, I got quest #30 then.
I completed quests #30 and #31 and then got #72 next.
What's weird is that when I got quest 30 (or 31, whichever is the one to kill Death Cows x 40), the quest already had 7 killed. Meaning that it started with 7/40 killed right away.
I also got a 2nd Crest of Monarch from them.