DOCBOOK-APPS: Chunk question

Hi

I use xsl stylesheet 1.5 chunk.xsl with Saxon. The chunk.first.sections
param is 0. It's works fine, but if sections are childs of some chapter's
first section, Saxon doesn't chunk sections the first section.

I send example : test.xml
and the generated html files : html.zip (2.1 section's childs not chunked)

What's the problem?

2. question: Can I prohibit chunk some sections, for example the section is
too small (simplesect doesn't appear in Toc)

Very thanks

Szazo