I just did scenario A on Friday. Before I ever got to the counter, #1 clerk is laughing at/ribbbing #2 clerk about how he is trying to save the customer money by offering her other suggestions. #1 clerk says rather loudly, "You're supposed to be pushing Express Delivery!" He says he's just trying to help the customer out, and clerk#1's customer is looking confused. Clerk #1 says, "I'm just giving him crap because he's not doing what we're supposed to do."
Then I step up to clerk #1, she weighs my package, totally skips the hazmat questions, tells me the charges for Priority and First Class, never even mentioning Express as an option, right after ribbing clerk #2. Then she asked me if I wanted delivery confirmation and insurance, etc. I said yes, and she said, "Which one or both?" I answered that I wanted insurance (and was intending to add the delivery confirmation because it's required if you're asked). We talked about the value of my package, got the insurance taken care of, and then she said, "Anything else?" I said something about delivery confirmation, and she said, "Oh, you don't need that. It's just another bar code for them to scan. It does the same thing as what you already have (pointing to the insurance bar code.)"
Hmmm. The way she was acting and being rather insistent that I did not need or want the delivery confirmation, I felt like if I were to push it, I'd be giving myself away, so I didn't. I felt I had to report what had happened, and now I'm wondering if it'll fly. And do they want to know what I heard before I ever even got up to the counter for help? I don't know, but it was the most unpleasant "shipping company" shop I've done so far. It is always so nice when they do and say what they're supposed to!