SagePay Server Product code/Order number issue

I am using the default SagePay Server plugin and opencart v2.2.0.0

When an order goes through to SagePay it gets the basket contents but the Product Code doesnt come through, it just shows as S1 or S2 on SagePay. I have filled in the product Model on the Opencart installation.

The Order Number on SagePay is blank, should this not get the order number from OpenCart?