Summary

When exporting a space as PDF, deselecting all pages or selecting only the top level page with Custom Export will still generate a PDF export of all pages in the space

Steps to Reproduce

1. Navigate to the space's Space Tools >> Content Tools >> Export >> PDF
2. Choose Custom Export
3. Select only the top level page, and deselect every other page in the space, especially its children pages (only 1 page selected)

Expected Results

Only 1 page would be included in the PDF export

Actual Results

All pages in the space will be included in the PDF export

Workaround

Export the individual pages in PDF format.