I think Shawn designed it to simply parse out some of the simpler html tags which are then applied using the RTF formatting options.
I can see how it would be a nightmare to try to reformat the RTF back into html to get it back out again.

 Quote:
Kixforms scans the HTML document and ignores most of the tags (the ones that
it does not understand). It picks out a few of them and uses them as formatting codes.
Some tag attributes and even a few style attributes are supported.