For the maths to work, those numbers are points for your OVERALL TOTAL mileage. I don't think you get the extra points PER DAY, just once at the start.
Day 1, you did 10 miles, at 5 points per mile = 50 points
Day 2, you did 28 miles, that's 2 points per mile for the first 10 miles (up to 20 miles) and then 1 point per mile for the next 18 miles (cos by now your TOTAL MILEAGE is over 20) so it adds up as: 20 + 18 = 38 points
Day 3 onwards, I guess you will get a point a mile. For the rest of the month.
So I don't think its encouraging us to do short journeys, I think that's to get people started on their first ten miles. Cos let's be honest, we cover a crapload more miles than your average pootler. You gotta think, a lot of peeps cover zero miles most weeks. So them extra points for the first few miles are been and gone for most of us by now. It's nothing but a point a mile from now on I guess...
Ahem.
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