I cannot disable my repeating trigger.

alright. In my boss fight dual. Kel'Thuzad has a set pattern of special attacks and before each special attack he has a little cinamatic speech... like "Taste this!"
selected from Kel'Thuzad's unit voices... The trigger has no event, I have another trigger that says run "special moves" trigger when Kel'Thuzad sees you, and after the special moves trigger is done, it repeats by having a run this trigger action"checking conditions" at the bottom so it repeats. and when he dies I have it turn off that trigger. But he doesn't shut up. he is dead and gone and no longer does special moves. But in the ending cinema every 10 seconds he yells "Taste this!" which interupts and wrecks the ending cinema... even thogh I have the trigger turn off when Kel'Thuzas dies... and I also even have a condition in his special moves event that is Kel'Thuzas is alive equal to true...
But still it doesn't stop it... the trigger is off and that Kel'Thuzad is dead and replaced by another kel'thuzad so the trigger should no longer run. So the question is, why is it? and how to I make it stop.

Make an if/then/else action, saying IF Kel is alive, run trigger, else do nothing.