Game Flavor (please complete the following information):
Classic Era

Describe the bug
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Here are the items I was able to buy. But note in the tooltip, there are only 2 shown.

You receive item: [Recipe: Carrion Surprise].
You receive item: [Recipe: Hot Lion Chops].
You receive item: [Recipe: Lean Venison].

WoWhead has them all listed out correctly for this NPC. Any way to re-import data across the board?

https://www.wowhead.com/classic/npc=12245/vendor-tron-1000#sells;0+1+14-2

Expected behavior
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Screenshots
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Additional context
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There were still 3 things I haven't collected yet.

The data is not missing. You have them collected already based on your filters.