Armor attributes bugged?

[Misery1ndex]

So ive been running 2 piece Marauder for the 60 health set bonus, and 2 piece grim ranger for the weapon skill cooldown set bonus. on top of that, the 4% weapon speed, and .8 physical power. Then you get the hollowfang for getting to act 2 and beating beatrice. But guess what? I actually lose health and set bonuses. Removing the grim ranger legs which has +76hp with the hollowfang which says it gives +101, but i actually lose 14 health, instead of gaining 25.

And to add insult to injury, you gotta kill that ♥♥♥♥♥ library boss who's level 50(on brutal difficulty) The whole point of getting a new armor set for beating a boss and unlocking it, should be about getting better gear. Gaining 4 gear levels, and being weaker doesnt make any sense to me.