Priest has the worst targeting of almost any class. If you happen to draw two or three things, and try to tab target to the thing beating on you. It almost always automatically targets the mob that 30 yards away rather than the thing standing tearing you to shreds. PLEASE DO SOMETHING ABOUT THIS.
Press tab again.
My favorite is tab targeting in torghast and cycling thru 20 phantasma pots before coming back to any enemies.
Would it be so hard to make tab only target enemies you are currently in combat with while in combat?
Also, how is this a priest only problem? I struggle with this on my DK all the time.