MDVP Collective check

Dear Experts

I am trying to execute the MDVP collectively.

I entered one part number ( A) and it has the component B and 2 planned orders

Stock of component B is 200 pcs

Requirement from each planned order is 400 pcs.

so in total 800 pcs are needed.

But on doing Availability check, the system gives that 50% of each planned order can be produced.

Ideally only one planned order of 50% can be produced and not 2. But the system is showing otherwise and marks the component B as Missing component.

i am using firm planned order too...

I am using customized checking rule which checks only physical stock. and Partial confirmation.

Am I missing something. Kindly guide.

thanks and regards

Nagendra Kumar