Huge Difference

SELECT * FROM gallery2 WHERE topic_id="1130549" UNION SELECT * FROM gallery2 WHERE topic_id="1464232" UNION SELECT * FROM gallery2 WHERE topic_id="1263842" UNION SELECT * FROM gallery2 WHERE topic_id="1562742" UNION SELECT * FROM gallery2 WHERE topic_id="1274522" UNION SELECT * FROM gallery2 WHERE topic_id="1505783" UNION SELECT * FROM gallery2 WHERE topic_id="691265" UNION SELECT * FROM gallery2 WHERE topic_id="97329" UNION SELECT * FROM gallery2 WHERE topic_id="940518" UNION SELECT * FROM gallery2 WHERE topic_id="518301" UNION SELECT * FROM gallery2 WHERE topic_id="941731" UNION SELECT * FROM gallery2 WHERE topic_id="561550" UNION SELECT * FROM gallery2 WHERE topic_id="1080041" UNION SELECT * FROM gallery2 WHERE topic_id="777487" UNION SELECT * FROM gallery2 WHERE topic_id="542908" UNION SELECT * FROM gallery2 WHERE topic_id="1598870"