Genesis + Ajax + Jquery | Failling to call action

If you are clicking the “submit” button in your form (which I am assuming); it will submit the form performing the default method GET where no method is specified.

You need to ensure that you prevent the default submit action.

In your JavaScript; you are listening for a change event on the entire form, instead you should bind to the submit button.

jQuery(document).ready(function($){

    jQuery('#ticket').on('click', '#submit', function(event){  

        //prevent the default submit action of the form...
        event.preventDefault();

        //issue ajax request
        jQuery.ajax({
            type: "POST",
            url : userlogin_object.ajaxurl,
            data : {
                'action': 'post_love_add_love',
                'whatever': userlogin_object.the_issue_key
            },
            success: function(response) {
                //process success response
                alert('Got this from the server: ' + response);
                jQuery("#form-messages2").html("TEST REQUEST");
            }
        });

    }); 

});

If you really must listen for change events; target the field that receives input, in your case it is one field only name="TKT_qty_new":

jQuery(document).ready(function($){

    jQuery('#ticket').on('keyup click', 'input[name="submit"], input[name="TKT_qty_new"]', function(event){  

        //prevent the default submit action of the form...
        event.preventDefault();

        if ( event.type === 'click' && event.target.name !== 'submit' ) {
            return false;
        }        

        doAjaxRequest();

    }); 

    function doAjaxRequest() {

        //issue ajax request
        jQuery.ajax({
            type: "POST",
            url : userlogin_object.ajaxurl,
            data : {
                'action': 'post_love_add_love',
                'whatever': userlogin_object.the_issue_key
            },
            success: function(response) {
                //process success response
                alert('Got this from the server: ' + response);
                jQuery("#form-messages2").html("TEST REQUEST");
            }
        });

    }      

});