invoice 2 Order

[webgonet]

I really need to understand something here:

 

I'd generated a quote. The client accepted it. I'd generated the invoice. The client paid it. So why are the items in the invoice NOT automatically "translated" into ordered items into the client area. And also if I want to place an order through the admin area why isn't there an option to add multiple products instead of "one at the time"

 

Thank you in anticipation for your support ....