Dear Quelfep,
You are getting hit for 86 and curly doesn't seem to have a beserker buff. Unless your shield was on and he was hitting 86 through the shield, I can guarantee you were hit by a sinister strike or less likely an eviscerate. However, all that is beside my point. What I want to say is that I see this happened sometime to me too. To a point of 70 yards. I would sometime get kite by a hunter after hitting him some. Then I end up seeing that I hit him for a certain amount of damage. However, his health doesn't change. It seems that some attack are registered as damage yet the damage animation don't show up till some seconds later. Sometime I got the opposite situation that you have where I am right on the person however I can't hit them even though they looked like they are right next to me. It is all lag in the end. However, I am a optimistic and I hope that this is real then I can finally hit hunters once before they kill me. I am not a greedy person I just want at least one hit before all my health go down.