Hi rockoladeluxe,
This problem have been corrected recently, it come from the name and the id for the vote module which are the same.
So some explorer don't make the difference between the both, that's why the stars of the comment module are called at the same time than the stars of the vote module.
In the next release this bug is corrected, but you can correct it by yourself if you want.
It involves some modifications.
Edit the file: YourSite/component/com_hikashop/views/vote/tmpl/form.php
Change:
echo "<select name='hikashop_vote_rating' id='hikashop_vote_rating' style='display:none;'>";
TO
echo '<select name="hikashop_vote_rating" id="hikashop_vote_rating_id">';
And edit the file: YourSite/administrator/component/com_hikashop/classes/vote.php
Replace all the:
hikashop_vote_rating
TO
hikashop_vote_rating_id