That's very interesting analysis!<br>
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(Remember that any systematic changes based on external data count as an import, so adjusting the mismatches to MAD is not OK without a plan and review.)<br>
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Existing names are from a previous import or hand mapping. For each mismatch, it would be good to understand the source of the existing data and also to figure out the truth, by street signs or from the local town clerk or local mappers.<br>
Can you post a plain text file with the info? That will be accessible to more people to check.<br>
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This investigation is also part of assessing how good the MAD is, which is part of the needed import documentation.