I think you might find that the start time needs to be changed to 8pm regardless of when the clocks go back. If the start time is logged as 9pm it will start at 9pm. It"s like when you change the time on your alarm clock, you move the hour but you still leave the alarm at the same time. It only actually has an effect on the day the time changes..
Roll on the start again, whatever time it may be...