jQuery AJAX form submits twice

As well as calling preventDefault, also call stopImmediatePropagation on the event.

$('#exportForm').submit(function(e){
    e.preventDefault();
    e.stopImmediatePropagation();
    $.ajax({
        type: "POST",
        url: $(this).attr( 'action' ),
        data: $(this).serialize(),
        success: function( response ) {
            console.log( response );
        }
    });

    return false;
});