Frontend validation - probably controller bug

		// Validate the posted data.
		$data = $model->validate($form, $data);

		// Check for errors.
		if ($data === false)
		{
	           some code here
		}

		// Attempt to save the data.
		$return = $model->save($data);

		// Check for errors.
		if ($return === false)
		{
	           some code here
		}

		// Check in the profile.
		if ($return)
		{
			$model->checkin($return);
		}

		// Clear the profile id from the session.
		$app->setUserState('com_pytania.edit.pytanie.id', null);

		// Redirect to the list screen.
		$this->setMessage(JText::_('COM_PYTANIA_ITEM_SAVED_SUCCESSFULLY'));
		$menu = JFactory::getApplication()->getMenu();
		$item = $menu->getActive();
		$url  = (empty($item->link) ? 'index.php?option=com_pytania&view=pytania' : $item->link);
		$this->setRedirect(JRoute::_($url, false));

		// Flush the data from the session.
		$app->setUserState('com_pytania.edit.pytanie.data', null);

		// Validate the posted data.
		$data = $model->validate($form, $data);

		// Check for errors.
		if ($data === false)
		{
	some code here
		} else {
            // Attempt to save the data.
            $return = $model->save($data);
        }

		// Check for errors.
		if ($return === false)
		{
	           some code here
		}

		// Check in the profile.
		if ($return)
		{
			$model->checkin($return);


		// Clear the profile id from the session.
		$app->setUserState('com_pytania.edit.pytanie.id', null);

		// Redirect to the list screen.
		$this->setMessage(JText::_('COM_PYTANIA_ITEM_SAVED_SUCCESSFULLY'));
		$menu = JFactory::getApplication()->getMenu();
		$item = $menu->getActive();
		$url  = (empty($item->link) ? 'index.php?option=com_pytania&view=pytania' : $item->link);
		$this->setRedirect(JRoute::_($url, false));

		// Flush the data from the session.
		$app->setUserState('com_pytania.edit.pytanie.data', null);
		}