It's probably me because there is so much about the combat system that mystifies me but I find that I change the hotbar choices for a new build and then enter a fight. I press some number between 1 and 5 to cast an ability only to realise that I've cast something else because my hotbar has reverted to the way it was before. Not only that but my hotbar is locked (being in combat) and I cannot change hotbars. What am I missing?
Also, why is my ultimate ability on a timer? I do the damage to build it up and then zone into the boss's den and my ultimate has gone because I didn't use it. That sucks! That really, really sucks!