The VA originally had me at 10% for hypothyroidism (SC) since I retired in 1988. After it became Agent Orange presumptive a few years ago, I filed an appeal and received 30%. However, I continued receiving 30% after the six month period, and now the VA wants to cut me back to 10% on hypothyroidism. They admit to CUE on their part. Will I have to pay them back for the additional twenty percent beyond six months since the error was on their part?