If you choose to format the pages so that it will flip pages like a notebook, it will cause the page to flip on the long side in portrait, which instead causes it to flip like a book. It will also flip on the landscape, causing the text to be upside down. As the rule states, flip up or flip over does not discriminate between which orientation the page is in. This will cause the portrait pages to flip upside down, but the landscape pages will read like a book. This is by design and is printing literally as it is stated in the print settings.