The system can assign a score to order lines in two ways:
One of the factors that R4277702 uses to calculate the score on order lines is 'Sold to customer priority' in Customer Master (P03013) application.
If you change the customer priority in Customer Master and rerun R4277702 on existing orders to re-calculate the score, the score will not change. But if you add a new sales order, R4277702 will calculate the score correctly based on the new customer priority.
To find out how to re-calculate score on an existing sales order please see R4277702 is not Re-Calculating Score on a Sales Order (Doc ID 2323830.1).