So a convenient source for the early sources that identify the messenger as Moroni are to be found at Mormon Think:
http://www.mormonthink.com/nephiweb.htmHere is a sample:
In 1835, Oliver Cowdery identified the angel:
"... and I believe that the angel Moroni, whose words I have been rehearsing, who communicated the knowledge of the records of the Nephites, in this age ..." (Oliver Cowdery, Letter 6, Messenger and Advocate 1:112, April, 1835)
The 1835 edition of the Doctrine and Covenants also identifies the angel:
"Behold this is wisdom in me: wherefore marvel not for the hour cometh that I will drink of the fruit of the vine with you on the earth, and with Moroni, whom I have sent unto you to reveal the Book of Mormon ..." (Doctrine and Covenants, 1835 edition, Section 50:2 (Section 27:5 in current edition))
Prior to the writing of the 1839 History, Joseph Smith himself identified the angel in print:
"How, and where did you obtain the Book of Mormon?
Answer. Moroni, the person who deposited the plates, from whence the Book of Mormon was translated, in a hill in Manchester, Ontario County, New York, being dead, and raised again therefrom, appeared unto me and told me where they were and gave me directions how to obtain them. I obtained them and the Urim and Thummim with them, by the means of which I translated the plates and thus came the Book of Mormon." (Elders Journal, 1, pp. 42-3, July 1838).
So, yes, it appears that there was some confusion. And it could be that DoubtingThomas is correct in thinking that the identity went Moroni>Nephi>Moroni.
The name Moroni even appears in the anti-Mormon
Mormonism Unveiled from
1831!
The Lord told [Joseph] that the man he saw was MORONI, with the plates, and if he had given him the five coppers, he might have gotten the plates again.
"Petition wasn’t meant to start a witch hunt as I’ve said 6000 times." ~ Hanna Seariac, LDS apologist