Hi Caroline,
Only one rating can done per post, but you can show that rating result or rating form in other posts or places by putting the specific post_id in the shortcode e.g. [mr_rating_form post_id=”2″] or [mr_rating_result post_id=”2″]. If you don’t put in the post_id shortcode attribute, the current post is used.
The Pro version has a feature to support multiple rating forms for the same post.
Thanks,
Daniel