Not sure if it is a bug or lack of update to the hunter section but aspect of the viper was not added to the hotbars. Once again another way to clean up the hunters bars zhunter. All you have to do is put zhunter in, scale it in size (down), slap it in the extra bar space in an nice way and order up the shoot/melee spells on the left side. I have put a possible suggestion image:
