That sounds like a real hassle but it was the server's error. There is no need to carry any additional cards with the DDP. Everything can be charged to your room card.
True, but this couple doesn't like to put the charging ability on their room key for whatever reason, so for them, there is a need to carry extra cards: first there is the room key with the DDP info on it, then there is a credit card (or cash if they chose to leave the tip with cash), and then the DDE card, plus the ID needed to prove they are the DDE holder. Obviously a lot of that can be eliminated by putting charging abilities on your room key, or not using the DDE, but for many of us, it's unfortunately necessary what with taking away the appetizer - why wouldn't you want to get the 20% off?
Also, I completely agree it was the server's mistake, but she even called the manager over, and he was baffled by why the computer rang it up this way, and apparently no one could figure out how to ring it properly.

We also all agreed that we would each happily pay another $10 per day for the DDP if only it would return to the way it was - appetizers included as well as the tip. Or at the least, include the tip and let us have a choice between appetizer and dessert! I know it's wishful thinking, what with table turnover and all that, but as it was, we all ordered appetizers and dessert anyway, so it didn't make the table turnover faster there!