[UConnJulie]

Right ... that is what I have always know ... to protect the foot and allow it to heal properly, you limit weightbearing (with appropriate bracing/footwear/casting). I think you need to clarify this with your foot guy ... ask him exactly what he wants to limit and at which joints (ankle-talocrural, any part of the foot-midtarsal, tarsometatarsal, etc). DEMONSTRTATE split squats/lunges/squats for him and have him tell you which he wants or doesn't want you doing ...
I know how frustrating this must be .... but remember that it will only be that much more difficult to walk if your remaining foot is permanently damaged due to Charcot ...