[Zope-CMF] Structure Text Question

[Rolander, Dan]

Why is it that when I add the following structured text to a CMF document:

Heading 1

  This is
  paragraph 1.

  Heading 2

    This is 
    paragraph 2.

    Heading 3

      This is
      paragraph 3.


It's rendered as this html:

  <h3>Heading 1</h3>
<p>  This is
  paragraph 1.</p>

<h4>Heading 2</h4>
<p>    This is 
    paragraph 2.</p>

<h5>Heading 3</h5>
<p>      This is
      paragraph 3.</p>


Specifically, I don't understand why it's coming out as <h3><h4><h5> instead
of <h1><h2><h3> ?

Dan