Still confused about something then - done only 3 rides with my new PT SL.
Did the 1st, downloaded.
Did the 2nd, then a 3rd ride hours later, BUT pressed the two buttons to clear the values for my second ride. When I downloaded I only had the 3rd ride and the 2nd one was lost.
So - what do I need to do to reset the distance, time and av speed and cadence between rides without clearing the memory?
The clear feature on the PowerTap clears all memory.
Instead of clearing you should consider either downloading after every ride or using the interval mode to record each ride separately, although this last method assumes that you are not using interval mode already during those two rides.