I'm in (better late than never) and it's all @Ufrasia's fault. Seems you can only log miles on the day, and not do it later in the week so we have to log in every day to keep the levels up.
London Cyclist blog has a big team (50+ people) as well, so a bit of healthy competition going on.
You can log miles for other days. Just change the date.
You can log miles for other days. Just change the date.