Playing on Bloodrose with the newest patch (The one for Gertenheld Forest) and resistances aren't fixed. They don't overlap anymore, but they don't turn off either. I was able to have Lightning Resistance, Fire Resistance, Poison Resistance, Ice Resistance and 70% stun resistance, even though what I had equipped did not give those bonuses. It wasn't just a display error either, I could resist any element regardless of what was equipped.