You might be able to cut down on losing bets by Leaving Kempton out of the system. The reason being is due to the Course being new, many of the competitors in anyone race will be running on the track for the first time and the horse with the top course figure will be meaningless.
For instance, yesterday 3 winners in the races your system had runners in had never run on the Kempton AW track before.
Had you taken kempton out of the syestem, yesterday would have been another profitable day.