When the switch?
 

When did Fuelly switch from entering miles traveled to odometer reading? :banghead::banghead:

And is there any way to change it back?

There should be an edit vehicle button.

You can select which method you prefer, even if you have more than one vehicle, you are able to select a different method for each, whatever you prefer really.

I changed it to trip miles for you. By default it selects odometer reading when you setup a new vehicle, unless you select "trip miles". If you click "edit vehicle" on the vehicle's page, you should see the setting.

Now that it is changed, you need to edit that fillup with the proper trip miles, (or post it here and I'll edit it for you).

Thank you all very much!!