Looks like you found a bug in our system that we need to patch up. Take a look at
your fuel log, and you'll see that every entry has "odometer" except the first one which has "miles". If we can figure out how that happened, we can get it patched up—because we shouldn't allow that to happen.
Can you give us a little more info about how that happened? We don't allow zero as a valid odometer reading.