Fishing Guild / Skill Trainer

From fishing Guild you can learn skill for Expand Warehouse... so by mistake i was on sub and learn this skill and when i switch on main i dont have it :D So if i make my inventory full with my sub who has this skill and i change to main :D that i dont have this skill what will happen with all this items that cannot be in this slots from sub class :D Why this skill is not for main dual and sub class when you learn it ones ? O_o axxaxa Ok i have money to learn it on all of them ! But whyyyyyyy ? :D this is stupid QQ It is 1 Character with Main,Dual and sub classes and you have 1 Warehouse for all of them not different WH for each... :D