I can confuse Drekk but when he uses Spinning Heads under confusion he still heals himself...now shouldnt this either be negated or reversed when confused?

what is the connection between confuse and negated or reversed healing ?!!!

if the skill is self-one then even after confusion he will get the heal ,, so in this case he will attack his team , daze them and heal himself

"50% chance of Dazing all targets. Heals of 10% by Monster targetted. Requires cooldown."

Spinning Heads heals the user and self-healing is not affected by confusion, so it's not bugged.