Speaking from personal experience, God can and does heal people. Alfweich, limbs being restored from amputation was common at the Azusua St. revival. I know a girl who much like myself had a condition which needed the use of glasses to correct. I was there when the healing took place.
Really? Were these people ever documented? Were they seen by a doctor? Because the growing of bone, cartilage, muscle, veins and skin from a 'stump' into a brand new leg would be world news. Seriously; it would make the first face transplant seem like childs play.
I'd imagine God made sure to include some convenient reason that this couldn't be documented. 
That always tends to happen.
