Why do some records in the smart list not seem to match my search criteria?

The Microsoft 365 add-in generates a smart list by searching against multiple attributes of a record, not just the name. If any of the attributes within the records contain your search criteria, they also show up in the smart list.

On the face of it, it may appear to you that the record that doesn't contain your search text also showed up on the list. But, that's not true. To see the matched text in the records, hover over the information icon on the right side of the records in the smart list. An information box appears showing the matched text in bold. You get an idea of the attribute that caused the record to appear on the smart list.