Don't all the trust characters do single target attacks anyway? Why do multiple pulls instead of just letting them fight and defeat the two ink mages as they have been programmed to do?

Evidently they haven't been programmed to allow for the player going "off-script" and initiating multiple fights at once in an area with lots of moving parts.

Maybe they can fix it, but you might just have to learn to work with the confines of the AI and not pull the ink mages into the next part of the fight.