Not sure what's going on... I've double checked fuel-up data, deleted and re-entered, but the last two entries for my Jetta are not calculated correctly. On edit, I can confirm the odometer entry is correct, yet the trip calculation returned is way off (and so to the other calculations).
Am I missing something? FWIW... this seems to have started about the time I first used the Fuelly iPhone app...?
Looks like you have some fuel-ups that are out of order. Take a look at all your fuel-ups here. And check out the entries on June 18th, 2009 and July 20th, 2009. The odometer readings are out of sequence. So your latest fuel-up on March 30th, 2010 had a reading of 114540, but way back in June it was 114164. The difference there is 376km, So Fuelly is trying to put them in order the best it can to come up with the tank mileage.
If you remove those two fuel-ups you should be set.