Retroactive rebate functionality

I am having a problem updating existing billing documents when I create a retroactive rebate. I have tried running OLI9 to update the S136 table, and then running SDBONT06 to update the billing documents. When SDBONT06 runs it tells me that the existing document numbers have already been assigned but when I look at these documents they do not have the rebate condition and the sales volume is not updated. I have read followed the instructions on note 105681 and 75778 and had no luck. Does anyone have any suggestions?