Robohelp and superscript text

I have FrameMaker 10 and RoboHelp 9.  When I convert a Framemaker document that has superscript text into RoboHelp, Robohelp skews the text.  The html reveals that it is not placing the "end superscript" commands correctly, it places it at the end of the sentence instead of after the superscript text.

Any help?