When exporting part of a space to XML, all content from the entire space is included in the resulting ZIP. This is obviously less than ideal for customers who want to export just a few pages and their attachments. A similar bug (CONF-2534) was fixed in a very early version of Confluence, this seems like a mistake rather than the intended behavior.

Steps to reproduce:

1. Create a space with two pages under the home page.
2. Add an attachment to one of the pages.
3. Export the space and only select the page without any attachments.
4. All pages from the space will be included in the ZIP.