Google Analytics tracks all visits to '/', unless it has a parameter - google-analytics

Question

This site is a Wordpress/WooCommerce-page, - so it has many different 'real' URL's.
In my Google Analytics-report, then the numbers under 'Behaviour' >> 'Overview' (and in 'Behaviour' >> 'Site Content' >> 'All Pages' for that matter) is looking wierd. If I have it shown as 'Page' then it bulks all visits that doesn't have a parameter (such as ?s=search_term or ?key=order_number) - and shows them all as visits to /. Example:
But if I click on 'Page title' instead, then the distribution is shown correctly (but I can, for obvious reason, not see the URL, which is annoying):
If I add the secondary dimension 'URL Destination', then it's just shown as not set.
How do I get 'the regular' (The page-view) to work? And why does this occur?

Answer 1

You have mixed syntax for "classic" Google Analytics and Universal Analytics. Also you are overriding the page path.
This is a screenshot from your code (tracking id removed):
This is "old" syntax. This still works and would not per se be a problem if you did not try to call Enhanced E-Ecommerce functions in the code that do not work with classic ga:
This creates a reference error:
The classic code has a variable that is called "ga", but that is not the same as the ga object in Universal Analytics (and also it sits inside a self executing function and is thus not available in the global scope).
The culprit for your page path problem however is this line:
_gaq.push(["_trackPageview", "/"]);
By setting the second argument to "/" you override the current page path and set it to "/" for all your Urls.
You should update your ga code with current Universal analytics code and not set a page path (i.e. do not provide a custom page to the send pageview call):
<script>
(function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
(i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
})(window,document,'script','https://www.google-analytics.com/analytics.js','ga');
ga('create', 'UA-XXXXXX-X', 'auto');
ga('send', 'pageview');
</script>