Hello,
This issue is related to these forum post:
www.smartaddons.com/forum/55-sj-k2-slideshow-ii/14854-solvedcustom-item-ordering-doesnt-work-well
and
www.smartaddons.com/forum/55-sj-k2-slideshow-ii/17106-solvedcustom-item-ordering-doesnt-work-well-2

In helper_base.php, before the rows:
$db->setQuery($query);
$items = $db->loadObjectList();

add these rows to order:
$orderby = "FIELD (i.id, ".implode(',', $current).")";
$query .= " ORDER BY ".$orderby;

Regards

Hi Andrea Montilli,

Thank you for your feedback
We will consider and update this issue.

Best regards,