Combat discipline damage bonus is applied widely on combat arts as soon as you take the skill, and tooltips are updated accordingly. Regen time bonus however requires you to put a CA in a combo to get it's benefits.
CAs such as Dust Devil, have a base cooldown + regeneration time. Putting it in a combo will affect it's regeneration time, but won't reduce it's base cooldown, which can only be achieved by using the proper mod (Recondition, in that case).
As it is now for you, it's 45.0s cooldown + 1.0s regeneration time, putting it in a combo properly applies 10% reduction to it's regeneration time, as 45.0s cooldown + 0.9s regeneration time.