Whether or not you "cover" the edits with cutaways is a stylistic choice. When you cut from two different past of an interview, especially when the focal length hasn't changed, the cut-known as a jump cut-can be jarring. Some filmmakers find an elegance or at least an honesty in a jump cut; there is no disguising that the material has been edited. Others "cover" the edit with a cutaway, so that the soundtrack continues, apparently seamlessly.