Rconnor, looks like you switched from tracking via tripometer to tracking via odometer. Looks like that caused the problem.
So your first fuel-up was tracked via miles. You entered zero, meaning you traveled no miles so Fuelly can't show an MPG for that. The 2nd entry was your first entry tracking with an odometer reading. Once you start tracking with odometer readings, Fuelly needs at least two fuel-ups before it can start showing an MPG for an individual tank. So you should start seeing an MPG on your next fuel-up.
Did you mean to make the switch from tripometer to odometer tracking?
cafepuya, it looks like you're switching back and forth between odometer readings and tripometer readings. Is there a reason for that? Can you try creating your car with a single method of tracking and entering your fuel-ups without switching back and forth?
I use odometer only, the car i created in december (accord) i started the settings with tripometer cos my odometer broke up, but now its working, and because it was the very first fuel up i changed it to "odometer" but the mpg didnt show up, ... as you can see i've created another car with the setting in "odometer" starting all over again and entering the same info, but it happened again but if you see, it happened in a different way. Well i supose yo have 1031 total miles.
Here's what I'd do. Remove the first vehicle you created in December.
Your other accord looks fine except that the first fuel-up has zero miles as the first fuel-up. Go here and look at the fuel-up on January 10. That zero miles means the fuel-up won't count in our system. Remove that fuel-up and everything else looks great.