This is consistent with other scriptures in the Book of Mormon and D&C. The term “Samites” is never found. This is because they were numbered with the “Nephites.” In Jacob’s list of the “ites” of the Book of Mormon, “Samites” are notably absent, Now the people which were not Lamanites were Nephites; nevertheless, they were called Nephites, Jacobites, Josephites, Zoramites, Lamanites, Lemuelites, and Ishmaelites (Jacob 1:13). DC 3:17-18 lists the Nephites, Jacobites, Josephites, Zoramites, Lamanites, Lemuelites, and Ishmaelites. Again “Samites” are notably absent.
This is remarkable doctrinal consistency for the machinations of an unschooled farm boy from Vermont. Unless, of course, he was a prophet of God.