Primary ship to site is not defaulting in sales order

Summary:

Primary ship to site is not defaulting in sales order

1.When we create sales order why the Ship-to Address is not defaulting the primary ship to address, we have already marked the ship to address as primary in the customer site level, also in the customer data management under organization level the primary flag is enable.
2.we have observed some strange thing, like the sites which are already end-dated are also showing in the sales order level.
3.Actually, there are two active sites are present for the customer in the customer level, but we are seeing new site at the sales order, which is not present in the customer level