SO Pricing modifier not showing up in AR Invoice

1. A sales Order is created with a Sales Order line amount of $10

2. Discount modifier is applied on the sales order line amount $1

3. Sales Order line price reflects the pricing modifier and the SO total now is $9

4. Sales Order shipped and interfaced to AR via Auto invoice

5. Once Invoice is created in AR, the invoice amount says $9

6. The original price and adjustment from the pricing modifier are not reflected on the AR invoice.

Is there a setup or profile option that I need to look at to achieve the above functionality?