LDAP Feeds not importing correctly

I think I have the same problem. I want to set up a query to import LDAP users as Drupal nodes (the idea is to display the members of an agency, but not to provide them with login credentials).
I have :

• set up a content type, "Agent" with several fields
• set up an LDAP Server (the connection tests ok)
• created an LDAP Query (the query tests ok and lists the expected data)
• set up a Feed (export below)

First thing I notice is that when I try to execute the Feed via cron, nothing appears to happen (the job executes very fast - much too fast for it to have executed the LDAP query, which is long).
I therefore try to execute the Feed via "form submission".
When I first created the Feed, I tried to put the "displayName" LDAP attribute into the Title field of the Agent content type and to make this the unique identifier. However when I submitted the "Create agent" form, I then got an error to the effect that it was unable to match the Title field.
So I tried again, installed Automatic Node Title module to generate a title, and put the displayName into another field.
This time, I got a better result. The return message was "1 node created, 22 updated" - so at least something is getting into the system! But what appears to be happening is that no account is taken of the unique ids. The first entry causes the node to be created, all the others cause it to be updated despite the fact that their unique identifiers (DN => GUID) are different.
Here is the Feed configuration:

$feeds_importer = new stdClass();
$feeds_importer->disabled = FALSE; /* Edit this to true to make a default feeds_importer disabled initially */
$feeds_importer->api_version = 1;
$feeds_importer->id = 'ldap_cap_soutien';
$feeds_importer->config = array(
  'name' => 'LDAP Cap Soutien',
  'description' => 'Importation des données annuaires de Cap Soutien',
  'fetcher' => array(
    'plugin_key' => 'FeedsLdapQueryFetcher',
    'config' => array(
      'query_ids' => array(
        'cap_soutien_1' => 'cap_soutien_1',
      ),
    ),
  ),
  'parser' => array(
    'plugin_key' => 'FeedsLdapEntryParser',
    'config' => array(),
  ),
  'processor' => array(
    'plugin_key' => 'FeedsNodeProcessor',
    'config' => array(
      'expire' => '-1',
      'author' => '1',
      'authorize' => 1,
      'mappings' => array(
        0 => array(
          'source' => 'dn',
          'target' => 'guid',
          'unique' => 1,
          'language' => 'und',
        ),
        1 => array(
          'source' => 'uidRH',
          'target' => 'field_identifiant_dgfip',
          'unique' => FALSE,
          'language' => 'und',
        ),
        2 => array(
          'source' => 'affectationSAGES',
          'target' => 'field_sages',
          'unique' => FALSE,
          'language' => 'und',
        ),
        3 => array(
          'source' => 'roomNumber',
          'target' => 'field_piece',
          'unique' => FALSE,
          'language' => 'und',
        ),
        4 => array(
          'source' => 'displayName',
          'target' => 'field_nom_affiche',
          'unique' => FALSE,
          'language' => 'und',
        ),
        5 => array(
          'source' => 'telephoneNumber',
          'target' => 'field_telephone',
          'unique' => FALSE,
          'language' => 'und',
        ),
      ),
      'insert_new' => '1',
      'update_existing' => '2',
      'update_non_existent' => 'delete',
      'input_format' => 'plain_text',
      'skip_hash_check' => 0,
      'bundle' => 'agent',
      'language' => 'und',
    ),
  ),
  'content_type' => 'agent',
  'update' => 0,
  'import_period' => '0',
  'expire_period' => 3600,
  'import_on_create' => 1,
  'process_in_background' => 0,
);

Just tried to reproduce this and it works fine, here is my minimal example with mail, name and guid set:

$feeds_importer = new stdClass();
$feeds_importer->disabled = FALSE; /* Edit this to true to make a default feeds_importer disabled initially */
$feeds_importer->api_version = 1;
$feeds_importer->id = 'ldap_example';
$feeds_importer->config = array(
  'name' => 'LDAP example',
  'description' => '',
  'fetcher' => array(
    'plugin_key' => 'FeedsLdapQueryFetcher',
    'config' => array(
      'query_ids' => array(
        1 => '1',
      ),
    ),
  ),
  'parser' => array(
    'plugin_key' => 'FeedsLdapEntryParser',
    'config' => array(),
  ),
  'processor' => array(
    'plugin_key' => 'FeedsUserProcessor',
    'config' => array(
      'roles' => array(
        3 => 0,
      ),
      'status' => '1',
      'defuse_mail' => 0,
      'mappings' => array(
        0 => array(
          'source' => 'dn',
          'target' => 'guid',
          'unique' => FALSE,
          'language' => 'und',
        ),
        1 => array(
          'source' => 'cn',
          'target' => 'name',
          'unique' => FALSE,
          'language' => 'und',
        ),
        2 => array(
          'source' => 'mail',
          'target' => 'mail',
          'unique' => FALSE,
        ),
      ),
      'insert_new' => '1',
      'update_existing' => '2',
      'update_non_existent' => 'skip',
      'input_format' => 'plain_text',
      'skip_hash_check' => 0,
      'bundle' => 'user',
      'language' => 'und',
    ),
  ),
  'content_type' => '',
  'update' => 0,
  'import_period' => '-1',
  'expire_period' => 3600,
  'import_on_create' => 1,
  'process_in_background' => 0,
);

See also https://www.drupal.org/docs/7/modules/lightweight-directory-access-proto...