Yes you did, watch your own video - it doesn't mean you had to force it to happen that way, the mechanic was BROKEN. You could luck into it (still can sometimes apparently, or could yesterday) working like that, but you guys were getting 'broken' marks after literally the very first reap in your kill there
In fact, when we were progressing on it EVERY kill with public logs was like that, it was the major reason it took us most of a day, just like "Why the fuck are we taking 6x as much mark of the necromancer damage as every kill? why are they only dispelling 2 times the entire fight?" and then we stumbled into what interrupts were doing to the boss.
Intentionally or not, you were doing the same thing. You guys literally did not have to dispel after the first set because the marks were coming BEFORE reap.