RMA receipt allowed more than order quantity

 

Hi Expert,

1. Sales return order line quantity is -4, but RAM receipt allowed 3 quantity '6' time of receipt.
2. Sales order line status still showing awaiting return only and the expected receipt quantity is always 4 qty only.
3. when i checked the material transaction 6 different receipt number 3 qty receive and deliver to inventory also
4. material workbench shows 18 qty.
5. SO order type is mixed and line type return cridet with receipt

Please guide me how to resolve