For an upcoming cruise 2 weeks from now, some were strange things are occuring in Dine My Way. First, we had Club Class Dining showing in the app 2 weeks ago. Now that isn't showing any longer--it's gone. I called the Medallion Support Office and spent 45 minutes talking to them and all they could do was have me delete the app and then reinstall. This did not fix the problem. The Rep then told me she would submit a Problem Report. Also, I wanted to book the Crown Grill. Each time I attempted to make a reservation at the Crown Grill, I would get this, "Sorry...We could not find any reservations at this time. Please check back later." The Medallion Support Rep. was unable to make a reservation for us at the Crown Grill for the entire 2 weeks!! I worked for many years redesigning and enhancing computer software and systems. It appears to me that this app was never properly tested or evaluated. At the end of my call with the Medallion Rep, she told me that I could make a reservation on board and they would know what to do about Club Class Dining! I advised her that I was fully aware that I could make a reservation on board, but was very disappointed that this app is so broken. I am beginning to question why I have spend all this time trying to fix and resolve issues that Princess should have fixed years ago!