Exactly why do you believe God should give an amputee a new limb. That is not healing, the wound was healed, if it had not healed the person would have died. I believe that a person would rather be alive, besides all the amputees I've seen interviewed after the Boston bombing were not crying to get their limb back, they accepted what happened and going to continue to live their life. You on the other hand just want something to complain about, you would waste your life moaning and groaning, while these good people live their lives.
God loves those who believe and those who do not and the same goes for me, you have no choice in this matter. That puts the matter of total free will to rest.