EW, you might want to adjust a bit, you're showing your presumptions.
Did the dish change completely? It did for you, and I totally respect and get that. But, it didn't for everyone. There's a fair number of people for whom 4e is not a "totally new dish". It's a new dish, it's got different whatevers, but, it's still D&D.
Your point is only valid if you could objectively show that 4e D&D is not really D&D. You can certainly prove it to yourself, but, there is no objective standard here.
For some, it's the same dish, just prepared differently, in the same way that Basic/Expert D&D, and 2e D&D with Skills and Powers, and 3e D&D using Tome of Battle and Unearthed Arcana are all still D&D. For some people, of course.
So, if you come from that perspective, then, yes, it is perfectly valid to have the item on the menu under the old name.
Not everyone shares your definition of D&D.