They are really emphasizing putting cold items with cold not mixing them up in a bag (previously they didn't care.....just let me do my damm job the way I was TRAINED to do it!!
You were not trained to bag cold with cold? I wouldn't want to have yogurt next to hot chicken, or produce next to laundry soap. Just common sense. Bag as you would want them bag for you. Not having to worry coming home after an hour of drive from store wondering if your turkey slices are still good to eat, because they were next to some hot soup or something. And cold items will keep each other cold, so another reason to bag them together.