C. F. Keil and Franz Delitzsch on Nehemiah 8:7

Neh 8:7

And Jeshua, Bani, etc., the Levites, expounded the law to the people (הבין, to cause to understand, here to instruct, by expounding the law). The ו copulative before הלויּם must certainly have been inserted in the text by a clerical error; for the previously named thirteen (or fourteen) persons are Levites, of whom Jeshua, Bani, Sherebiah, and Hodijah occur again, Neh 9:4-5. The names Jeshua, Sherebiah, Shabtai, and Jozabad are also met with Neh 12:14; Neh 11:16, but belong in these latter passages to other individuals who were heads of classes of Levites.