The fact that the content is still wrapped in <!--raw-->
and <!--/raw-->
suggests that the posts were not actually processed by the Raw HTML plugin. Normally, when the plugin processes a post, it removes those special tags and leaves only the content.
One way this could go wrong is using a theme that doesn’t apply the usual post filters. The plugin uses the the_content
filter to process the tags. If you’re using a theme that doesn’t trigger this filter, the plugin just won’t get a chance to do anything with the content.