Is there some jQuery conflict here?

If I click on the large button on the bottom of your page (the one in your first screenshot), then your page is called with the parameter ?paged=2. If I call your page directly with this parameter, I got the following JS error TypeError: $ is not a function

From the source of your page:

<!-- Clickable Nav Script-->
    <script>
    $(function () { ... }
    </script>

Replace it with this:

<!-- Clickable Nav Script-->
    <script>
    jQuery(function ($) { ... }
    </script>