Our stores once counted two wrapped shapes on a pallet as packages, though one was a protective cover; do your arrival photographs show what those two entries might have meant?
Leave that panel in the breakdown too. Otherwise somebody will discover your second received item and announce the mystery solved. Ask them to trace the hardware crate by its own mark from the consolidator's intake.
Caleb, does the consolidator acknowledge receiving that third item? I'm not sure whether tracing means they have found it in their records or are still asking the seller for it.