Hi Laurie, I'm going to look into this issue for you - please check for a reply to your support ticket!
For anyone else - if you use File > Export, you are exporting the content - meaning the export will ignore the white space and start at the beginning of your content. If you want to have the entire page exported including the blank space - File > Print > Bottom Let Dropdown Menu > Save as PDF.
Thanks, That has resolved my issue. Much appreciated.