Do identical DoTs stack on npcs on p99?

[solutionx]

Just a question out of curiosity. Because it took SoE a patch long after Velious launch to allow necromancer dots to have multiple versions stack on npcs. This was massively detrimental to any DPS we might have been able to provide during long-term raid bosses if several necros were present (as was usually the case).

Basically, for the longest time - and without most of us knowing - we were getting kicked in the nuts.