Print out a transcript correction/update form from LSDAS, and give it to your schools registrars office and tell them to attach it to your updated transcript. LSDAS will process this within 3-5 business days and send out an updated LSAC report to each school to which you have already applied at no extra cost. Bonus/potential bad thing: They don't notify the schools that its coming, so your app is not placed on hold at the AdComm office. If you do not have the form attached to your transcript, LSDAS will record it as a duplicate when they receive it and eventually it will be destroyed.
Just went through this. Call LSDAS, they will answer all your questions (just make sure to select the phone menu option that puts you through to a report/transcript specialist).