Full Confirmation automatically makes "Open TR" quantity as zero

Hi Experts,

I have the following scenario:

1. Material A; Production order 1; Quantity = 10 pcs; Components B, C

2. I perform replenishment of the components for the Transfer Request required for 4 pcs

3. Do a partial confirmation for 2 pcs

4. Do a Full confirmation without the tick mark on "Clear Open Reservation" for 2 pcs (Total 2 +2 = 4 pcs; Order quantity was 10 pcs)

5. I expect the Open TR quanitity to be 6 pcs (10 - 2 - 2 = 6)

Configuration:

a. The configuration setting in OPK4 (Plant + Order type) configuration -->"Clear open reservations" not ticked

b. While doing final confirmation, i do not tick "Clear open Reservation.

The problem we are facing is that once we perform "Final confirmation" without reaching the production order quantity, the open TR quantity is becoming zero. We want to avoid this. Please advice how to achieve this.

br,

Ganesh