Discounts by sales order total in Advanced Pricing

Hi everyone,

I'm trying to set up some discounts that seemed simple at first, but I haven't been able to configure them as needed.

I need to apply three percentage discounts on the total order amount.
For example, for an order of $1000, the discounts should be:

10% » $100

20% » $200

2% » $20

All three discounts must be calculated based on the original order total ($1000) , but I need three separate discounts because each one impacts a different accounting account.

I tried using order level adjustments (which create additional lines in F4211 with code 3), but the second discount is calculated on the already reduced amount, and not on 1000 anymore.