Drop rates off? (zenn's bidding)

just got 100% drop rate on all 3 items in wow classic. definitely not how i remember this quest. looking at the items on wowhead seem to point towards a 25-35% drop chance per… but i got all 9 in a row. deleted 3 from my inventory and got another 3 in a row for 12/12 100% drop rate. rng is rng but this seems wrong.