That's really interesting. We've had a funny week. DS normally has a very good number at 9pm before his snack, and his snack ratio at that time is set to raise him a little for overnight. This week however (baring mind we've moved house and routine is different, going to sleep earlier etc) he has been much higher around late check 11.30ish, typically between 12 and 14, though one night we caught the lowest low he's had a scary 1.6. Usually if he is a higher at 11pm he normally comes back into range by morning, this week it's been hit and miss if he's been in range by morning. Till now had put it down to new routine,,,though day time everything has been fine...you now have me wondering if it's a growth spurt...11 years old.