In created pages, "Free text" areas are not marked off to keep them separate from Sections.
As a result, any free-text underneath a section will get loaded into that section's input-box on "Edit with form".
This applies to any text under a section: So, if you manually put a Category tag at the bottom of the page, when user goes to edit page with form, the Category tag will get loaded into the last section box, where the user might delete or alter it, thus removing the page from your intended Category.
Possible fixes:
- Mark off free-text areas, so the Form knows they are separate from sections
- Mark off the entire form region, so users can safely put text both above and below the form region, and the form will ignore it.
Reported here.