Avery Labels "creep" when printed to PDF

I have an avery label layout with specific margins. The margins are set up "facing each other," so that there is always a wider inner margin on the pages when they're printed.

When I go into preview mode, FileMaker correctly alternates the margins so that the larger margin would always be on the inside of the page. However, when I try printing this to a PDF, the labels shift, well, oddly. Instead of the records sliding back and forth (a result from the larger margin alternating between the right and left sides of the page), they instead shift right for the first page, then right again for the second page, then right again for the third, then alternates between the margins of the second and third pages until the end.

I've included a sample database to recreate this, as well as the PDF that I created from this database. Is there something I'm doing wrong here, or is this is existing issue with FileMaker that we'll have to work around? Perhaps it's something else?

Thanks.

AveryLabelsCreep.zip