Ability's Levels dont do anything.

So I created an ability for a hero from an item ability. He gains different amount of hp per level. I understand that becasue it is an item the ability icon wont appear, but that is not the problem. When I lean lv 1 of this ability his hp goes up by the set amount (50hp), but when I learn lv 2 nothing changes, same with every lv after it. I have set ability to have 5 levels and each level the hp increase is 50, 150, 300, 450 , 600. But no matter which lv he learns after 1 he doesnt gain hp.

I can't be sure from how you said it, did you set the numbers on the ability thing for the levels to something like 50, 50, 50, or did you set it to 50, 100, 150? If it's the first case, change it to the second. Otherwise, something else must be wrong related to the ability, but I can't really think of what.

mine is like the seond thing you wrote (50, 100, 250, 500) but with each level the heros doesnt increase past the first one