We're working on Odoo10 Enterprise, installed modules are POS, inventory, manufacturing, accounting and JIT

we need to accomplish the following goals:

1- when an order is placed and validated on POS and automatic Manufacturing order is created

2- the auto MRP order should finish automatically and update stock

what is done:

on the product we choose "Make to order" and "Manufacture"

what happens is that when POS order is validated the stock becomes "-1" which means warehouse is updated correctly, however no Manufacturing order is created although we try to run the scheduler and jit is installed!

any help to automate the process?