First, always use the like button generator:
https://developers.facebook.com/docs/reference/plugins/like/
Second, it helps in many cases to use the like button with an app id. Usually the spam confirmation does not show up that often if you use an app id for the facebook integration.
Example (fill in the appId):
<div id="fb-root"></div>
<script>(function(d, s, id) {
var js, fjs = d.getElementsByTagName(s)[0];
if (d.getElementById(id)) return;
js = d.createElement(s); js.id = id;
js.src = "//connect.facebook.net/de_DE/all.js#xfbml=1&appId=xxxxxxx";
fjs.parentNode.insertBefore(js, fjs);
}(document, 'script', 'facebook-jssdk'));</script>
If that does not work, you can only wait, or maybe it helps to refresh the liked URL in the Facebook debugger:
https://developers.facebook.com/tools/debug