Demon form double spirit cost

The spirit skill toggle works strangely with demon form. Instead of the demon form tab the one that is working in demon form is the second weapon set tab. Toggling skills in the demon form tab does not do anything.

But if you toggle in the second weapon set tab, the spirit skill costs are doubled. If you toggle a Cast on Crit, it reserves 200 spirit (instead of 100) on the toggle screen. However, the spirit meter above the mana meter shows that only 100 was reserved but it still locks you out of using other spirit skills if you have 200 max spirit.