109 WPF isn't a lot. If you wear fat armor, it will be reduced to 90 or less.
I think what you are experiencing is hiltslashes. Unfortunately, it's currently possible to do damage VERY early in the animation, when it actually should glance on anything but naked skin, but since Paul changed the armor formula, it's even possible to cut through plate this way. 2h animations are best for this, but even polearm and 1h left to right swing works, if you use a weapon with high damage and have high PS.
That's why I suggest you never try the right to left swing against 2h in tight situations. They will connect earlier, even if you blocked their previous swing and start your counterswing immediately afterwards.