That fact that they ever did this is kinda crazy. Did they not imagine that someone would try to sell counterfeit products? Commingling means that a seller could be hit by a refund and bad review for a product that was never theirs.
You could wonder if the distributor is commingling. Milk production, probably. They’re taking responsibility for the quality of the final product, though.
Now the location is clearly printed on each bag.
Grocery stores have distribution trains from trusted vendors, with QC and regulatory oversight to defend them against the liability they are subject to if they sell a harmful product.
For one thing, the grocery store is deciding what produce to stock and what suppliers to get it from. They can choose suppliers that have at least a minimum standard of quality. They don't just let anyone on the world slap a barcode on anything at all, claim it's a grapefruit, and put it into their stores.
For another, a large fraction of produce (though not all) is bought in person, and customers can see if it's obviously bad quality before buying it, unlike Amazon where all you have to go by is the product listing for the SKU.