change in uc_stocklevels.module
~ line 139
$form['table']['body'][$key]['is_tracked'] = array(
'#type' => 'checkbox',
'#default_value' => $stock_level->is_tracked, <=== THIS ONE!
'#prefix' => '<td>',
'#suffix' => '</td>'
);and
~ line 180
function uc_stocklevels_product_node_form_submit($form_id, $values)
{
if(isset($values['quantity'])) // If there at attributes then this will not be set
{
// Convert the 'is_tracking' option to a boolean (1 or 0)
$is_tracked = ($values['tracking_options']['is_tracked']) 1: 0; <== THIS ONE TOO!
$detail = _uc_stocklevels_get_details($values['model']);
should fix the default "1" value for column "is_tracked" in table "uc_stocklevels"