SAGE 100 - Purchase Order Receipt

We are using Scanforce to receive Purchase Orders. At times we will have two unloaders both using their own login to enter the receipt of goods for the items they unload.  The PO is entered using the Freight Amount option and is one amount for the entire PO.  What we are finding is that this amount is being doubled because of two ROGs being entered. Is there a way to avoid this from doubling the freight amount while still using 2 receivers?

Thank you!