Reg Planned order Scheduling

Hi All,

In our business the materials are planned on monthly basis.

I had created a requirement for a material for the month of November 2013.

The scheduling Type is forward.

But when I run the MRP the system is scheduling the order in the month of December 2013(December 1 st) and proposes rescheduling to the current month(November 1st).

I unable to understand the behavior of the system as why its not scheduling in the current month or from the current date.

Can you please explain me the system's behavior?

Thanking you in advance.

Regards

Richie