Can you look at my last fill up (June 13)? It was the first fill after using the updated Iphone app. The mileage didn't register. When I logged on again, I don't see the fillup at all, as if it didn't happen. The app doesn't appear to load timely, only displaying a message saying loading vehicle data.
I do see that there is no MPG on most of your fuelups. I checked the old site and your vehicles look the exact same way. You have marked most of your fuelups as partial, which is why the MPG is not displaying. Please see RobertV's post above in regards to partial fuelups.
Thing is, ive been doing the same with my Landy for over 2 years showes results