First fill ignored in ODO mode.
 

When adding the first figures in odometer mode, I could not get my first fill to be taken in to account.

I got the car new with a full tank and my first fill should have been used.

I tried creating a dummy first fill with 0 km and a full tank of litres, then putting my first fill in as the second entry but it was still not used for calculation.

Yep, it says so right in our FAQ on the Odometer tracking:

"If you don't want to track the miles between fuel-ups yourself, you can simply enter your odometer reading each time you fuel-up. You won't get any stats on your first fuel-up, but Fuelly will begin tracking your miles (or kilometers) from then on."

We measure your fuel economy only after we know how far you have traveled and how much fuel you have purchased for that. Your first fuel up with odometer tracking gives us no reference distance. It's unfortunate (but necessary) that your first fuelup doesn't give you an economy number but it starts working from the second fuel up onwards, and it's much easier to track versus doing tripometer tracking.

The first fill up was done pre sale at zero km. This is indicated by the first fillup entry.

The next fill I did at 601km. It has no consumption figure calculated for it either even though it is the second entry!?

Please have a look at my outback diesel entries. You will see that the first two (not one) have not been calculated.

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.

We don't allow zero as a valid odometer reading.

I was wrong. Took another look at the code and we did allow zero as an odometer reading. That's where the error is, our system shouldn't allow that.

I patched it up so this won't happen in the future. For now, I'd remove your first fuel-up and you'll be all set. Sorry about this confusion.

Thanks.

Set the initial odo to 1 instead of 0 and it now seems to work.