I have 10 delivery notes and when I raise invoice I select customer and click get item from delivery note but I can select same delivery note number while it should not be displayed in get item from delivery note. It creates confusion.
Yes, that’s how it is designed right now. You can pull the items from the same delivery note as many times as you like. What is also confusing is that there is no way to tell which delivery note you already pulled the items from, because the item table in the invoice doesn’t show the delivery note number.