When i go back from an item to a list the itemid does not follow.

solution:
file: ..../administrator/components/com..../classes/controller/item.php
function: protected function applyRedirection($result, $redirections, $vars = array())

blok:
$followers = array( 'cid' => 'ARRAY',
'tmpl' => 'CMD',
'itemId' => 'CMD',
'lang' => 'CMD');

must be:
$followers = array( 'cid' => 'ARRAY',
'tmpl' => 'CMD',
'Itemid' => 'CMD',
'lang' => 'CMD');

Fixed.
Thank you for your help.