Sales Order still exists in Sales Transaction Entry after transferred to Invoice and Purchase Order Received

Hi Everyone,

I have this scenario in Great Plains 2010 where I the Purchase Order/s committed to 1 sales order was already received and invoiced but I can still open that sales order in sales transaction entry. We know that after the sales order was already transferred to invoice, it should not be viewable in Sales Transaction Entry > Order.

Also, Invoice was already posted before.

Thanks!