Vlookup returning incorrect results

What you are missing is simply that what looks the same is not.

No hope of a more precise diagnosis without your providing a sample sheet showing the issue, although sometimes it's when you try to compare a number to text, and of course they don't match, or there are leading or trailing spaces causing a mismatch.

There are instructions at the top of the page explaining how to attach your sample workbook.

What are you expecting it to return in rows 17 and below? There is nothing in B17, so nothing to find.

VLOOKUP is not working incorrectly - you have incorrect expectations.

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