Vendor confirmation via EDI treated differently by MRP than Manually enterd

Question

I have a strange situation with MRP. 
I have a schedule agreement with the following information.
Date          Delivery sch            vendor confirmation
05/03/07          100                         100
05/10/07          100                         100
05/17/07          100                         100
05/24/07          100                         100
05/31/07          100                         100
06/07/07          100                         100
06/14/07          100                         100
Then I increase my independent requirments on 05/10/07 to 200. 
If I have input my vendor confirmation manually via ME38, then MRP will add an additional Schedule line on 05/10/07 as I expected.   However if the vendor confirmations were sent in via idocs/edi then the schedule line is not added until the end of the confirmations.   
Does anyone know why MRP would treat these differently based on if the confirmation were manual versus EDI?

Answer 1

It should not be treated saperately by MRP if it is posted manually or via EDI
i can think one thing that
do you have diff confirmaiton category for EDI and diff for manually than it can happen
so just make sure that all the confirmation category which you use is check for MRP relevant or not in
SPRO_MM_Purchasing-conformation-Set Up Confirmation Control-select your EDI confirmation contro key and click on confirmation sequence
and check here that the conf cat is check for MRP or not
if not than check than you will see that MEP will pickup that.