In a note to this text, the Joseph Smith Papers website notes that

Parrish’s transcription of JS’s vision seems to differentiate Adam and the archangel Michael as two separate individuals. Yet JS identified Michael as Adam at least a year earlier and made the same identification four years later.

In his paper, "Brigham Young's Teachings on Adam" (URL: https://www.fairlatterdaysaints.org/wp-content/uploads/2011/11/2009_Brigham_Youngs_Teachings_On_Adam.pdf) Matthew B. Brown noted that

The “Mi” of “Michael” and the word “my” that follows almost immediately after it have the exact same sound. The structures within the sentence are also identical (“and Mi . . . and my”). It seems, therefore, that Warren Parrish (a relatively recent convert [20 May 1833] and newly assigned scribe for the Prophet [29 October 1835]) may have recorded a modified dittography based upon what he heard Joseph Smith say. (p. 22 n. 54)