I do not know why this hasn't been fixed yet. But here is how to fix it for those who are tired of this bug.
open RScomments.php located in: /components/com_rscomments/helpers/
Subject is on line #227, the Comments are on line #234 (although I wasn't having the problem with the comments, just the subject. You need to strip the slashes. Example for subject:
$subject = ($config->enable_title_field == 1) ? '<span id="rscsubject'.$comment->IdComment.'">'.$comment->subject.'</span>' : '';
Add a line after this to read like this:
$subject = ($config->enable_title_field == 1) ? '<span id="rscsubject'.$comment->IdComment.'">'.$comment->subject.'</span>' : '';
$subject = stripslashes($subject);