No bug here. Genies couldn't cast disruption ray, due to Fullmetal ability, so it is left curse, weakness, delay, decay and confusion to cast.
As all that spells were already cast, after a point, genies start to extend the duration of one already there. (curse)
If the battle had last longer, and the other spells (confusion, delay, weakness, decay) run out, they would cast them instead of curse. |
