Does anyone know — if another dependent appeared during administrative processing, does that mean the principal visa (L1/H1B) needs to be filed again? The original application did list dependents, so I don’t understand whether everything will have to be redone because of this.
No — don’t touch the primary. The dependent files a separate DS-160 and has their own interview. AP (administrative processing) for the main case goes on its own track.
Don’t worry so much, you don’t need to reapply for anything. The dependent goes its own way — a separate DS-160 and their own interview; don’t touch the main one. I remember that panic myself when it seems like everything is falling apart, but in reality everything gets sorted out calmly )