I may recollect some details incorrectly, as this project was two years ago. These items were not matched by name. At the time I was working with a NARA employee (as a volunteer) to link as many of their authority records as possible with the plan to further develop Wikidata items once that was done. This may have changed, but at the time each NARA authority record was linked to a specific LC authority record. They are not visible on the page, but they were in the HTML so I could harvest them with OpenRefine. We discovered that some of the NARA authority records linked to (in our opinion) the wrong person, but we did not want to override their judgement and kept the links in Wikidata, with the hopes that we could get someone at NARA to clean up their authority records in the future. Unfortunately my contact no longer works for NARA and this project has ceased, so I have no objection if you edit any of these items any way you see fit.