Hi,
Regarding the Yes/No radio buttons, it's because of the template which doesn't handle the CSS of bootstrap properly.
We'll add an option to handle that properly in next version. For now, change the line:
include_once(dirname(__FILE__).DS.'joomla30.php');
to:
if($app->isAdmin()) include_once(dirname(__FILE__).DS.'joomla30.php'); }else{ class JHtmlHikaselect extends JHTMLSelect{} }
in the file administrator/components/com_hikashop/helpers/helper.php and that will circumvent the problem.
regarding the popup, that's probably also coming from the handling of the bootstrap library of your template.
Change the Popup mode option of the hikaShop configuration and try again.