I added a fuel up via my mobile on the 4th of August which isn't showing on my list of fuel ups and doesn't appear to be counting towards my stats (ODO 120569, 45L, MPG was 28, last MPG is still showing as 32.x).
However, if I add the fuel up again, it adds an entry that shows I did .9 miles and got .1 MPG (meaning that it things my ODO reading was 120659 before and now 120659.9 and I've used 45L of fuel up doing .9 miles).
Edit: never mind, fixed it. The most recent fuel up had a date in April... US/UK date issue submitting from my phone? Either way... changed the date and things are right again.