Event + hitCallback (through GTM)

[Álvaro Verdeja Junco]

I have an e-commerce (Magento) website. On the cart page, at the proceed to Checkout button, I have the following event:

dataLayer.push({'checkoutURL':'http://www.mydomain.com/es/onestepcheckout/','event':'proceedCheckout-click'});

When the users clicks, the following tag should by fired:

<script type="text/javascript">

ga('send', 'event', {

  eventCategory: {{pageType}},

  eventAction: {{event}},

  eventLabel: {{basketQuantity}},

  eventValue: {{basketTotal}},

  hitCallback: function() {

    window.location={{checkoutURL}};

  }

});

</script>

Now... when the user clicks it's redirected to the checkoutURL.

If I remove the hitCallback function, nothing happens, so I understand that the event is stored at Analytics and then the user is redirected.

The problem is that I have mucho more visits to the checkoutURL (coming from the cart -navigation summary-) than events for it.

Can you help me?

Similar happens on the add to cart button :s