Your reasoning is overly simplistic. You obviously have no legal experience in the plea bargaining process. I understand why you can not follow this very complex plea bargain with your limited knowledge of the process.
Darn your overly simplistic reasoning...
My reasoning is based entirely on the Manuel for Court-Martial. After you've cured your possibly terminal case of cranial rectosis, you should find a copy of MCM, and look up Rule 705. It spells it out in great detail the steps that must be taken when entering a guilty plea, to especially include guilty plea as part of a plea agreement.
Did I mention you're an idiot?