In his editing for the 1837 edition, Joseph Smith removed the repeated subject pronoun they. Obviously, this kind of editing is unnecessary except from a stylistic point of view. Joseph soon discontinued most of his stylistic editing; consider the following unaltered examples found later on in the text:
Summary: Restore the repeated subject pronoun they in 1 Nephi 13:14; not only is it supported by the earliest textual sources, but the only reason for its removal was a question of style.