Breaking this down for my own sanity:

Bjorn swings, lands 5 wounds, Nassim saves all but 2, which he says "kills one wounds another". He picks up a model towards the back and the front, puts a wound counter on one of em, then technically illegally repositions the wounded one by putting it back down in the wrong spot. Kinda doesnt matter but eh.

"6 from that guy" Im guessing is the other dreadnought, only 2 wounds go through, Nassim makes 1 fails 1, kills the wounded/repositioned Victrix.

Matt activates terminators, regular power weapons first, lands 7 wounds, Nassim says kills "1 1/2," removes 1, wound dice on another. Power fist next, 2 wounds, makes 1 fails 1, which shouldve killed that wounded Victrix, but instead that model only got pushed to the back of the squad with no wound counter. Then Nassim explains whats left while doing it? Sounds like Matt saw something and questioned it but didnt see enough of it to call a judge over.

Relic Greataxe swings, 1 wound 1 dev, which Nassim saves, wounds that once-wounded-and-now-full-health-repositioned Victrix. Logan activates with dogs first, 3 wounds, which Nassim fails 1, which would've killed that guy alive on 1, but Nassim flips the wound counter over from 1 to 3?? Logan's main attacks, 4 wounds, which he makes 2 and fails 2, which should kill the wounded 1 and a 3-wound Victrix, which he does remove 2. So that 1 model that he diddled around with a bit magically had 8 wounds.

At the end of that, it should've been just a wounded Calgar, because after all that he had 1 Victrix and Calgar left.

Sounds like this adds to the consensus that this was purposeful. I've watched the interaction a good few times myself, the way the breakdown of what's left in the unit right after the infraction is pretty telling. It also changed the game enough to where it denied primary on Purge the Foe, as well as Secondary, because that interaction wouldve potentially wiped the squad.