I remember when, as a member of BMG, that the UPC codes said "created for distribution by BMG Music Club" or something like that. Do these CH DVDs say the same thing?

No they do not. It's exactly the same as those you get at a retailer.

This is not always true. I tried to return a Charlie and the Chocolate Factory Deluxe set to a store, after buying it for 25 from them and then much cheaper from CH just a few days later, and they said that the upc didn't match (1 number was off by one digit). Turns out that some stores actually get a slightly different upc codes for some of their stock than other stores, etc.