So...I target the tank and start healing healing healing...Then suddenly he takes a huge spike in damage, so I panic and start tossing Lustrates at him. And it's here that something strange happens...The first Lustrate lands on him, the second on me, and the third on him.

The above scenario has manifested in various forms over my time playing. Occasionally, a heal(Lustrate, Adloquium, and Physick alike) would end up hitting me instead of the targeted tank. Similarly, I was noticing that a
/ac "Lustrate" <t>
/ac "Lustrate <tt>
macro wasn't working properly. When I flipped those two lines, suddenly every lustrate hit me when I was targeting the tank.

Browsing through the options, I found nothing that would seem to cause this. It was annoying, but the occasional wandering heal didn't stop me overall, so I didn't care enough.

But now it's interfering with my ability to do coil, and so I'd like to change this self-targeting behavior. Someone know the option to stop this?