We need to set separate billing and shipping address.
but when we place the order at that time same billing address set as shipping.
Please share if you have any ideas.
It totally depends over your browser. Because sometimes these browsers save the cache. Which later help the user to enter the billing system automatically. Even it matters in terms of forum policies. If the platform support the auto fill system. Than will let you store your billing address.
In my experience on JD Williams Catalog every time you order online, always clear your history first and make sure that the setting of your account address is clear..