Wrong NBT amount in pricing conditions of sales order....

Dear All,

In our pricing method we have configured that NBT is calculated for net value of standard price minus given discounts to the customer. Our NBT percentage is 2% from the above mentioned net value. But in some sales orders we identified that NBT has been calculated to net value which has not been deduct total discounts.

As an example:

So finally NBT calculation is wrong. As per above correct NBT value shoulb be 46. But in my scenario it is 48. Can anyone explain me what is the reason on behind this.

Thanks,

Regards,

Lakshan