Your trainer should be thrashed. Just remember, any time you see that consignee alert pop up, it means that your diad has one or more choices in the consignee field. First thing you should see when you scan your first pkg is the address screen. If you little arrow down the first time you'll see the list of names to pick from. Once you know the list of names you can just use the first letter of any name in that field to bring it up the next time you deliver that stop.
So for example, if you're at Walmart, and if the consignee name in your diad is entered as "Pharmacy" or "Store #267" or "The Optical Shop" you need to know this first, otherwise you're just guessing.