It doesn't look like you have actually updated the 'Update Record' (although your first edit of your reply did show that it had been uodates
Looking at your code , this
$WA_fieldNamesStr = "title|short_description|long_description|img|img_thumb|img2|img3|date|month|year|author|category|editor|ref|keywords";
$WA_fieldValuesStr = "".((isse t($_POST["title"]))?$_POST["title"]:"") ."" . "|" . "".((isset($_POST["short_description"]))?$_POST["short_description"]:"") ."" . "|" . "".((isset($_POST["long_description"]))?$_POST["long_description"]:"") ."" . "|" . "".((isset($_POST["img"]))?$_POST["img"]:"") ."" . "|" . "".((isset($_POST["img_thumb"]))?$_POST["img_thumb"]:"") ."" . "|" . "".((isset($_POST["img2"]))?$_POST["img2"]:"") ."" . "|" . "".((isset($_POST["img3"]))?$_POST["img3"]:"") ."" . "|" . "".((isset($_POST["date"]))?$_POST["date"]:"") ."" . &quo t;|" . "".((isset($_POST["month"]))?$_POST["month"]:"") ."" . "|" . "".((isset($_POST["year"]))?$_POST["year"]:"") ."" . "|" . "".((isset($_POST["author"]))?$_POST["author"]:"") ."" . "|" . "".((isset($_POST["category"]))?$_POST["category"]:"") ."" . "|" . "".((isset($_POST["editor"]))?$_POST["editor"]:"") ."" . "|" . "".((isset($_POST["ref"]))?$_POST["ref"]:"") ."" . "|" . "".((isset($_POST["keywords"]))?$_POST["keywords"]:"") ."";
$WA_columnTypesStr = "',none,''|',none,''|',none,''|',none,''|',none,''|',none,''|',none,''|',none,''|',none,''|',none, ''|',none,''|',none,''|',none,''|',none,''|',none,''";
$WA_comparisonStr = "=|=|=|=|=|=|=|=|=|=|=|=|=|=|=";
Should be
$WA_fieldNamesStr = "title|short_description|long_description|img|img_thumb|img2|img3|date|month|year|author|category|editor|ref|keywords|permalink";
$WA_fieldValuesStr = "".((isse t($_POST["title"]))?$_POST["title"]:"") ."" . "|" . "".((isset($_POST["short_description"]))?$_POST["short_description"]:"") ."" . "|" . "".((isset($_POST["long_description"]))?$_POST["long_description"]:"") ."" . "|" . "".((isset($_POST["img"]))?$_POST["img"]:"") ."" . "|" . "".((isset($_POST["img_thumb"]))?$_POST["img_thumb"]:"") ."" . "|" . "".((isset($_POST["img2"]))?$_POST["img2"]:"") ."" . "|" . "".((isset($_POST["img3"]))?$_POST["img3"]:"") ."" . "|" . "".((isset($_POST["date"]))?$_POST["date"]:"") ."" . &quo t;|" . "".((isset($_POST["month"]))?$_POST["month"]:"") ."" . "|" . "".((isset($_POST["year"]))?$_POST["year"]:"") ."" . "|" . "".((isset($_POST["author"]))?$_POST["author"]:"") ."" . "|" . "".((isset($_POST["category"]))?$_POST["category"]:"") ."" . "|" . "".((isset($_POST["editor"]))?$_POST["editor"]:"") ."" . "|" . "".((isset($_POST["ref"]))?$_POST["ref"]:"") ."" . "|" . "".((isset($_POST["keywords"]))?$_POST["keywords"]:"") ."" . "|" . "".((isset($_POST["title"]))?$_POST["title"]:"") ."";
$WA_columnTypesStr = "',none,''|',none,''|',none,''|',none,''|',none,''|',none,''|',none,''|',none,''|',none,''|',none, ''|',none,''|',none,''|',none,''|',none,''|',none,''|',none,''";
$WA_comparisonStr = "=|=|=|=|=|=|=|=|=|=|=|=|=|=|=|=";
