The ordered list on my RoboHelp 10 page doesn't appear in IE9. Most of our users are IE9. When I look at the HTML I can see it, so the content is there. I tried cleaning up the HTML and generating several times, to no avail. This is the first time I've encountered this problem, and I can't find anything in the forums.
Also, the problem is specific to IE9. Pages appear normally in IE8. RoboHelp 10 doesn't support Chrome.
There are a few aftermarket patches for RoboHelp 10 that you have to install manuall, please see: RoboHelp Patches and Updates | WvanWeelden.eu That also fixes Chrome issues.
What kind of ordered lists are you using? Regular lists or Multilevel lists? Are the multilevel lists located in a dropdown? What is the HTML and CSS of the lists?