فَعَلَ and فَعِلَ are not the same pattern
In the basic form فَعَلَ, the middle root letter has fatḥah. In فَعِلَ, it has kasrah.
Examples: جَعَلَ has middle fatḥah, while عَمِلَ has middle kasrah.
Memory aid: The 3 groups below only organize meanings. They are not new grammar categories.