Migrate does not create new users/nodes, just updates them

So I had to reinstall migrate, but before I did, for each of my migrate classes, there were 2 of the same name that showed up when I ran a drush ms.

Now, there is only one. Here is my problem

drush ms User

returns

Group: default         Total  Imported  Unimported  Status  Last imported
 User  122    121       1           Idle    2013-06-01 18:40:45

If I run it, it returns

Processed 122 (0 created, 122 updated, 0 failed, 0 ignored) in 26.3 sec (278/min) - done with 'User'                                                               

As you can see, it tries to update it rather then create a new user. Before, if I ran drush mi User, it would return two lines, one creating a single entry, the other updating all of them. if I were to run it again, with no changes, it would create no users, and update all of them.

I have attached part of my class below.

class MigrateUser extends Migration {
  public function __construct() {
    parent::__construct();
    $this->description = t('Migrate UMSI people into accounts');
     
   
    $this->highwaterField = array(
      'name' => 'LASTUP',  
      'type' => 'int',
    );
    $this->map = new MigrateSQLMap($this->machineName,
      array(
        'UserId' => array(
          'type' => 'int',
          'unsigned' => TRUE,
          'not null' => TRUE,
          'description' => 'UserId',
        )
      ),
      MigrateDestinationNode::getKeySchema()
    );

    // Source fields available from the Oracle table.
    $fields = array(
      'JOBCODE'=>t('Job'),
      'Email' => t('email'),
      'UserID' => t('Id'),
    );
  ##### removed queries. 
    $this->source = new MigrateSourceOracle($conf['oracle_db'], $query, $count_query, $fields);
    $this->destination = new MigrateDestinationUser();


    // Basic fields
 $this->addFieldMapping('mail','mail');
 $this->addFieldMapping('name', 'UserID')->dedupe('users', 'name');
 $this->addFieldMapping('roles','role');
 $this->addFieldMapping('status')->defaultValue(1);
    // Unmapped destination fields
    $this->addUnmigratedDestinations(array('is_new', 'promote',
      'revision', 'language', 'sticky', 'revision_uid', 'path','created','changed','log','tnid'));
  }

  
}

Does anyone have any ideas what was going on before, and why it stopped working now?