"On Document" Aggregation Method for Tier Pricing

I am currently using tier pricing to adjust a discount list.

The requirement is the ability to calculate the item price based on the TOTAL order quantity (NOT item quantity). Looking at Oracle's Documentation, it shows that the "On Document" Aggregation Method can: "Calculate adjustment according to the total quantity or total amount for the entire sales order or document"

However, once the tier price is set to On Document, it is not calculating based on the total.

For example:

Sales Order:

• Item SKU3440: 2 boxes ordered
• Item SKU2563: 3 boxes ordered

Tier Price:

• Item SKU3440: 1 to 3 boxes = $10 each 4-9999 boxes $5 each