added August 10, 2014
There is a bug in tex4ht as of texlive 2014. When using report style the table of content shows section even if told not to.
Use the patch shown in this link. Edit your report.4ht by the patch shown
The report.4ht file is located in
/usr/local/texlive/2014/texmf-dist/tex/generic/tex4ht/report.4ht
This is until the fix is added to texlive.
Note: The above only work if the HTML page is not split. If you are splitting it, then the bug is stil there and not fixed.