Dagger Affinity appears to be a problem with any dagger type that is not a traditional dagger (blade and grip). Dual Bladed daggers do not update the kill count. This was also noted back when Dagger Mastery was a Weekend Challenge. In that instance the only way I was able to get the dagger counts to update was use gray single blade daggers.
Having leveled an Alchemist and Assassin through 50 levels, my Dagger Affinity kill count sits at 301/500 - where similar kill counts are much higher - Staff and Bow have already been completed; Sword, Axe, Maul, Greatsword, Mace, Greataxe range between 312-1316.
There either needs to be a Twin Blade Affinity or fix applied to make sure that kills are counted properly for all dagger types.
