Urok Doomhowl (10584)

When summoning Urok Doomhowl at his pile of skulls inside LBRS, an evident bug takes place: the boss spawns twice:

The process is the following

- Use the head+pole, start event

- Boss spawns, you have to kill him of course   <----- this is the wrong step.

- Other adds spawn on a sequence, you kill the adds

- At the end, boss spawns again (as he normally should).

There is also another major bug when compared to retail: spawning adds are supposed to attack  THE PIKE, not the player(s).  

This is how it's supposed to work:

The players are supposed to defend the pike, killing the adds.
If the adds succeed to damage the pike "enough" (can't remember how much), the event fails and the boss does not spawn.
If the players defend the pike, the boss spawns at the end.

This is how it currently works on Zero:

Adds attack the player(s), not the pike.

I tried to look inside the DB but I could not possibly find where the scripts are saved and linked to creature 10584 (Urok) or gameobject 175621 (the pile). No joy. 
If someone prompts me on where to look at, I'll try to fiddle and maybe fix. Thanks

U