I don’t see a movement disorder diagnosed? But wearing a boot to protect your tendon and broken bone seems appropriate. If you’re experiencing gait issues with or without an assistive device you may need some PT to help educate yourself on what you may be doing wrong. The addition of a shoe lift in the good foot I’m certain has added another layer of complications to deal with. I presume an orthopedic doctor is prescribing these so ask for a PT consult to help you figure out why this is occurring.