What is the deal with healer aggro ?

I go into a dungeon, The tank pulls, and yes I wait for the tank to establish. No I do not ever run past the tank.
Some if not all the mobs head straight for me.

I know certain spells pull aggro . But this is getting ridiculous.

I AM allowed to heal right ? Without having to spam heal myself because in CM all the adds head for me because I have to heal people who should not be getting aggro .

I can understand some aggro but this is getting out of hand.

Healer Aggro needs to be adjusted.