Having trouble with hex and focus.

Button one:
/focus target

Button two:
/cast [target=focus] Hex

Don't think I can make it any simpler. But it isn't working for me. On trash with similar named mobs, I often still just hex the wrong target. I was sure that focus doesn't take identical names into account, but seriously.

I pull a pack with uglybastard, another uglybastard and a eunich, right. I focus one uglybastard and want to kill the other uglybastard, focus the one. Target the other, pull. Hex when in 20 yard range. And bang, the uglybastard I'm dps'ing gets hexed. What!? :<

Is anyone else having problems with this? I double, no triple checked my macro's. No idea what I'm doing wrong.


PS: Range on hex is kinda sucky, can't hex pull things. :<