My plugins are not updated long time ago, sorry about. Today I finally released new version of the "KC s2M Pro-rates" plugin, with tiny, but nice update. Now plugin works with multiple "Checkout Options" of s2M shortcodes. As usual, all they must be "modify" type, each option. Means, the plugin still can not "see" the wrapping shortcode, just inside options. So plugin's shortcodes must replace the option shortcodes. Be careful when apply.