Manual condition type when entered through BAPI comes twice.

Hi,

I created a Sales order through BAPI,ZFNN is my condition type which i entred price through BAPI.

Only problem is that condition type appears twice in Sales Order.But the value did not come twice.

I wanted the condition type to sit on the condition type it self,rather than adding one more condition type.

The major problem is possibility that i can change the price of condition type through BAPI.

Please find the below screen shot.I have made change of price through BAPI_SALESORDER_CHANGE.

Because of this it creates a big impact to my Net Value and Tax.It should be 100000,upon which ZVAT is to be calculated,becuse of reverse pricing mechanism it should be 5213.Then the net value should 94787.My question why should a separate condition line item is created (added) in sales order,when there is a change in price. Because of this i am getting the error.