Sometimes the new orders are not reflected in the order list though the payments are finished. It mostly happens that we can't receive the notification from Payment service (eg: Palpal)due to the network problems. In this case, you can search and retrieve the missing orders. Just go to Sales->Orders, choose the 'Missing orders' under the 'Status' and then click the 'Filter' button. After your searching, you can get and change it's status to what ever you want.