Printing Handouts Ignores Selected Order

Trying to print a 28-page Impress slideshow as a Handout: File > Print > Document (Handout). While the default Order is "Left to right, then down", the preview pane instead shows the slides in order top-down-then-right. If I change the selection to "Top to bottom, then right", then no change occurs to the preview. Confirmed by printing to an XPS file and then viewing that the slide order is indeed the same with either setting (cannot print in preferred format left-to-right-then-down).