Some of the pattern pieces are oriented landscape and some in portrait mode due to their shapes and sizes in order to fit onto the page. It’s not uncommon for a printer to default to a different printing percentage in order to get it to print “right”. So for my printer for example, I choose letter size but then it defaults to “fit to printable area”. I have to unclick that box and click the blank box and type “100%”. Also you’ll want to make sure that neither the “portrait” or “landscape” button is checked, because it needs to be on “auto”. Hope that helps!