Using ->limit() in conjunction with many-to-many with mysql generates wrong SQL

User:
  columns:
    username: { type: string(255) }
  relations:
    Operators:
      foreignAlias: Users
      class:        Operator
      refClass:     OperatorUser

Operator:
  columns:
    username: { type: string(255) }
    type:     { type: integer }


OperatorUser:
  columns:
    user_id:      { type: integer }
    operator_id:  { type: integer }
  relations:
    Operator:
      foreignAlias: OperatorUser
    User:
      foreignAlias: OperatorUser

Doctrine_Core::getTable('User')
  ->createQuery('User')
  ->leftJoin('User.Operators Operator')
  ->addWhere('Operator.type = ?', 1)
  ->limit(10)
  ->offset(0)
  ->execute()
;

SELECT u.id AS u__id, u.username AS u__username, o.id AS o__id, o.username AS o__username, o.type AS o__type
FROM user u
LEFT JOIN operator_user o2  ON (u.id = o2.user_id)
LEFT JOIN operator o        ON o.id = o2.operator_id
WHERE (o.type = '1')
LIMIT 10

SELECT u.id AS u__id, u.username AS u__username, o.id AS o__id, o.username AS o__username, o.type AS o__type
FROM user u
LEFT JOIN operator_user o2  ON (u.id = o2.user_id)
LEFT JOIN operator o        ON o.id = o2.operator_id
WHERE
  u.id IS NULL # is not expected
  AND (o.type = '1')
# there's no LIMIT clause