Oder Level Discount Applicability

Hi,
I have below Functionality
-----------------------------------------
Sales Order 1
Item A
Unit Selling Price 10

Line Level Discount
Percent = 10%
Value = 10% of 10 = 1
Item Value after Discount = 10 -1 = 9
Order Value = 9

Order Level Discount
Percent = 10%
Value = 10% of 9 = 0.9
Item Value After Discount = 9 - 0.9 = 8.1
Order Value = 8.1
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But when i am creating below modifiers and performing actions than below is the result

Actual
Sales Order 1
Item A
Unit Selling Price 10

Line Level Discount
Percent = 10%
Value = 10% of 10 = 1
Item Value after Discount = 10 -1 = 9
Order Value = 9
-------
Line Level Modifier Used
Level - Line
Percent = 10
Pricing Phase = List Line Adjustment
-------
Order Level Modifier Used
Level - Order
Percent = 10
Pricing Phase = Header Level Adjustments