hi,
just messed around a bit with the triggers, i can only make them fire twice if i add another trigger to pressed. but if i do it will fire twice on trigger… i had in my old game pressed and released and hooked up trigger and completed and i had this bug firing twice. tried adding to mapping action key a trigger and to the key itself, but it only fires once as far as there is only one trigger.
i will explore it a bit more 
cheers