Got a new prosthesis

Our daughter got her first prosthesis. It became obvious though that the person who designed this one was thinking of people who have amputations - not with people who have fully functional ankles/knees. This prosthesis, the prostheticist said, was desgined to remove weight off of the foot and transfer it to the skin/hip. Her first imaging showed a potential Class C Aitkins with a complete foot, ankle, and no hemimelia of the tibia - so we were a bit perplexed - but he said that's what is supposed to happen.