Read the first GIANT BOLD TEXT LINE of the OP. Where it says RAID.
Not sure if this is a tip/trick or a cautionary tale. Last night I was on a heroic Tol'vir run, and during the shadow phase of the Barim fight I laid out my Frostfire Orb, which proceeded to kill my already wounded healer and then start laying into the warlock next to me rather than attacking the phoenix. I'll try to duplicate the issue again tonight and capture a log, but my party won't like me for it.