Ok, went to deck 8 and found out the deal...for this cruise and the last one, because of "high volume", whatever that means...on sea days they are the same as the MDR. And when I ate there it was a sea day. On the other days they are the American Diner.
Furthermore, they are aware they don't show up in the app (which is why I couldn't find them) and they've talked to IT about it (lol, sure that will be fixed REAL soon)
The menu looks good ..all day breakfast, wings, burgers etc.
And they are open during the day for lunch
I'm going to try and do dinner there tomorrow.
Wow...I didn't think things could be this confusing, but obviously they are.