You can find the instructions on how to print multiple pages per sheet in the user guide on page 142, click here for the link. If you are still having issues after trying these steps, I suggest that you call into our support department for assistance @ 1-800-821-2797 or 1-800-835-6100.
When selecting 'print 2 pages on each page', the printer doesn't shift the layout. I expect that, when printing 2 pages on each page on portrait, the page would look like a book. Instead, I get two portrait pages crammed together, splitting the page vertically, leaving blank spaces at both the top and bottom of the page.
So I tried landscape and the same issue arose in that it didn't shift the layout of the page while printing.
I've never experienced this with a printer - once I press 'print two pages on one page', the change was automatic. Is there somewhere in the settings that can I fix this?