Dynamic rounding profile not working when Purchase order having multiple delivery schedule

Hi,

I have an issue where our purchase requisitions are combined to a single line item when the purchase order is created. We have multiple purchase requisitions created on the same day for the same material. We have a rounding profile assigned to the material master. When we group these requisitions to create one line item in the purchase order , it was observed that the dynamic rounding profile is not working when the delivery schedule of the line item has multiple lines. It is working fine if there is only 1 delivery schedule. Can you suggest why SAP is not taking rounding profile into consideration when there is multiple delivery schedule

Regards

Nevin