PDF file contains only the most recent submission data.

These instructions don't work. Followed them to the letter and only the most recent entry gets included n the PDF report. Call Survey Monkey for help-- they've had a foolproof option for this function for a decade.

Could you please share the URL of the form on which you are trying to download submissions?

Also, please make sure that Time Frame should be set to All Time if you wish to download all the submissions.