Just noticed something else. The "number of fuel ups" in annual reports count fuel ups AND notes. So for example, I have only filled up my MR2 twice in 2015, but since I've been working on it I've logged a bunch of notes. My annual report for 2015 says I have 10 fuel ups.
Just pointing it out. The number of total fuel ups on the main vehicle page works fine, it seems to count correctly.