the quest at this point does cast the spell but it does not count it thus this part
UPDATE `quest_template` SET `ReqSpellCast1` = 86264 WHERE `entry` = 27671;
secondly when you do cast the right spell the creature aka gnome just stands there this is not according to official the creature despawns thus this part
-- Creature id: 46268
UPDATE creature_template SET AIName='EventAI' WHERE entry=46268;
DELETE FROM creature_ai_scripts WHERE creature_id=46268;
INSERT INTO creature_ai_scripts VALUES
('300000000','46268','8','0','100','0','86264','-1','0','0','41','1000','0','0','0','0','0','0','0','0','0','0','gnome despawn on hit');
to answer your question no this is the correct creature
wowhead:
http://www.wowhead.com/npc=46268/survivor