ASCP using supplier calendar not manufacturing calendar

Hello experts,

when we checked on Planner workbench - ASCP calculating as per supplier calendar not as per manufacturing calendar for calculating dates.

in ASCP instance profile -  set MSC: Use Shipping/Receiving Calendar N

so how it considering supplier calendar ??

suggested dock date = 30 Mr 2020  and sugg order date = 30-jan-2020

(procesing lead time 60 days )

supplier calendar = all work days defined .

some profiles set -

MSO: Avoid non working days for Buy/Transfer order dates = No

MSO: Enable Decision Rules = No

MSC: Buy Order Processing Lead Time Calendar = Null

MSO: Avoid non working days for Buy/Transfer order dates = Yes

MSO: Use Shift Definitions When Scheduling Lead Times= N