When i dont have the mana to "recast" the combat training after it is already open and being used it forces me to wait till i run out of mana, or in the case of my mana regen i can never deactivate it, have to relog to reset it, I went onto OSI and tested and it does let you recast the ability to take away whatever training you had on your pet, i.e. Berserk, consume damage, etc.