I dont think the program has good enough control of the feet, yet. They sometimes just dangle around in the animation. When they do, then program the foot attributes. Then seperate the knee and upper leg as well, with attributes.
and then lets see
the foot bones connected to the ankle bone
the ankle bones connected to the leg bone
the leg bones connected to the thigh bone
(Cmon everybody Sing along)
the Thigh bones connected to the Ah, Hell I forgot
Whats the thigh bone connected to?