One record per show, following the money the way it actually moves: sales → labels generated → shipped → USPS delivered → payout landed. A payout is expected only after USPS marks the orders delivered — before that, pending is normal. The one state this app flags is delivered but not paid. Every figure here is your own entry — the app checks nothing against Whatnot.
Durable storage: this browser does not say. Keep a backup file — it is the only copy outside this device.