Kha'Zix gameplay problems with new HUD

I've recently played Kha'Zix after some days without playing the game and noticed some problems with the new HUD released on the 5.14 patch, on arriving level 6, 11 and 16, his skills can be evolved. However, it's extremely confusing when the player is going to evolve the pretended skill, once the normal 'up skill' button is exactly the same of 'evolving skill' button. Even after playing three games with him I evolved the wrong skill on levels 6 or 11.

I hope that Riot will see this and do something about this problem.