[NAB] Levelup/down and Un-practice-able skills

[Ashido]

I have the Furyuumonko Combo in Leaf Ninjutsu and Genjutsu. Which are Un-practice-able skills, Well i leveled, down below the genjutsu one to put points into ningu, I see my skill isn't disappearing but is the skill's effects negated? Also Bikku had said if i can't unpractice it, then i shouldn't be able to level down below that skills, and that it should be a bug.

[Gatz]

The skill's affect does go away.

[Ashido]

Good to know thank you Gatz