Need by date Schedule Option not honored in production scheduling

Summary:

We can see a behavior in Production scheduling Gantt chart where same Work Order which of FG item is pegged to 2 Child WO's - both Child Work orders Need by date is different one in month of march, other in April and it is pegged to one FG only whose need by date is in April. For the March Child Work order the parent Work order should get created for March only but instead it can be pushed to April and also pegged to 2 child Work orders.

Client wants Production scheduling to have separate Work orders to each of the Child Work order. I enabled the schedule option as below: