Join de 2 tablas devuelve mas registros de los esperados

[tokkaido]

Hola, creo que asi se hace, no? pegando aqui

Código MySQL:

CREATE TABLE `detalle_vales` (
  `id_interno` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `id_solicitud` int(11) NOT NULL,
  `saliente` int(11) NOT NULL,
  `sal_estado` varchar(10) NOT NULL,
  `sal_ok` bit(1) NOT NULL,
  `sal_medida` int(10) unsigned NOT NULL,
  `entrante` int(50) NOT NULL,
  `ent_estado` varchar(10) NOT NULL,
  `ent_ok` bit(1) NOT NULL,
  `ent_medida` int(11) NOT NULL,
  `fecha_sal` datetime NOT NULL,
  `fecha_ent` datetime NOT NULL,
  PRIMARY KEY (`id_interno`)
) ENGINE=MyISAM AUTO_INCREMENT=4 DEFAULT CHARSET=latin1;
 
 
INSERT INTO `detalle_vales` VALUES ('1', '1', '3157', 'Nuevo', '
', '1', '3027', 'Usado', '
', '11', '2010-04-04 16:16:27', '2010-04-04 16:20:25');
INSERT INTO `detalle_vales` VALUES ('2', '1', '3158', 'Nuevo', '
', '6', '3028', 'Usado', '
', '11', '2010-04-04 16:16:36', '2010-04-04 16:19:52');
INSERT INTO `detalle_vales` VALUES ('3', '1', '3159', 'Nuevo', '
', '6', '2537', 'Usado', '
', '11', '2010-04-04 16:20:26', '2010-04-04 16:20:28');
 
CREATE TABLE `detalle_solicitud_cambio` (
  `id_interno` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `id_solicitud` int(10) unsigned NOT NULL,
  `posicion` tinyint(3) unsigned NOT NULL,
  `entrante` smallint(5) unsigned NOT NULL,
  `ent_id` int(10) unsigned NOT NULL,
  `ent_medida` tinyint(4) unsigned NOT NULL,
  `ent_estado` varchar(10) NOT NULL,
  `ent_prof` tinyint(4) unsigned NOT NULL,
  `ent_presion` tinyint(4) unsigned NOT NULL,
  `ent_ok` bit(1) NOT NULL,
  `ent_fecha` datetime NOT NULL,
  `saliente` smallint(5) unsigned NOT NULL,
  `sal_id` int(10) unsigned NOT NULL,
  `sal_medida` tinyint(4) unsigned NOT NULL,
  `sal_estado` varchar(10) NOT NULL,
  `sal_prof` tinyint(4) unsigned NOT NULL,
  `sal_presion` tinyint(3) unsigned NOT NULL,
  `sal_ok` bit(1) NOT NULL,
  `sal_fecha` datetime NOT NULL,
  `condicion` tinyint(3) unsigned NOT NULL,
  `motivo` tinyint(3) unsigned NOT NULL,
  PRIMARY KEY (`id_interno`)
) ENGINE=MyISAM AUTO_INCREMENT=4 DEFAULT CHARSET=latin1;
 
INSERT INTO `detalle_solicitud_cambio` VALUES ('1', '1', '1', '3157', '2', '1', 'Nuevo', '25', '0', '', '0000-00-00 00:00:00', '3027', '144', '11', 'Usado', '8', '0', '
', '2010-04-04 16:11:35', '3', '4');
INSERT INTO `detalle_solicitud_cambio` VALUES ('2', '1', '2', '3158', '1', '6', 'Nuevo', '26', '0', '
', '2010-04-04 16:19:10', '3028', '145', '11', 'Usado', '6', '0', '
', '2010-04-04 16:08:28', '4', '2');
INSERT INTO `detalle_solicitud_cambio` VALUES ('3', '1', '3', '3159', '1', '6', 'Nuevo', '26', '0', '', '0000-00-00 00:00:00', '2537', '146', '11', 'Usado', '5', '0', '
', '2010-04-04 16:11:09', '4', '3');
 

gracias de antebrazo, perdon, mano,