COGI Error Cleanup.

I am in the Process of helping one of our Bracnh Plants cleanup there COGI errors and ran across a problem which I can not figure out. My ultimate goal is to be able to TECO the Collective Prodcution Order and also Activate the Deletion Flag. I have used VL09 to Reverse all the Goods Movements, VL02N to delete the Delivery Line, and CO13 to Cancell the Confirmatiom. My problem is with one of the Lower Level Production Orders, as the Status shows Partially Delivered and also a Confirmed Finish Date. I have tried runing CO13 again in the Lower Level Production Order, and there is no Confirmation to Cancell. Thanks in advance for your help.