Past Due Orders show suggested due date earlier than plan run date

Hi Team,

we have ran our weekly ran yesterday "17/08/2015" , but i could observe that for many of the past due orders for "Forecast","work orders ","purchase orders","sales orders".

I could see the Suggested due date as "14/08/2015".

As per the logic we shouldn't have any orders with suggested due date earlier than plan run date.

Any pointers on this issue.

Please kindly help.

Thanks,

Pranathi