I am a colleague of the OP, Tage. We are still experiencing the problem described above with wrong numbering in nested ordered list:
Xhtml code:
<section class="key" id="key_163">
<h2 id="h2_224">Oppgave 5.82</h2>
<ol start="2" type="a">
<li>
<ol>
<li>0,15 cm/dag</li>
<li>3,5 cm/dag</li>
<li>6,5 cm/dag</li>
</ol></li>
<li>
<ol>
<li>1,36 cm/dag</li>
<li><p>1,35 cm/dag</p>
<p>1,35 cm/dag</p></li>
</ol></li>
</ol>
</section>
renders the following output when doing an ebook-convert to docx:
xxx2 Oppgave 5.82
b. 0,15 cm/dag
1. 3,5 cm/dag
2. 6,5 cm/dag
c.
1. 1,36 cm/dag
2. 1,35 cm/dag
1,35 cm/dag
Looking like the attached image.