Vendor Returns negative PO's and impact on MRP

Hello, all,

We are looking for opportunities to manage vendor quality systems within JD Edwards and we're finding some gaps in the process.  I'm finding documentation that vendor returns should be managed as negative PO's however, it's showing up in our MRP plans as a requirement.  In addition, accounting wants to stop using this as they are causing double entries.  Anyone using some alternative method of managing vendor quality management and returns?