So I did a HIM a week ago and used my SRM with PCV. During the race when i started the bike I did a zero off set. I made 2 sets during the bike, 1st half of the bike and 2nd half of the bike. The headset read 250-252 average watt for the second spilt while I was riding. When I uploaded the data to my computer it showed my average for the second split as 142. This seems to happen most of the time when training, checking my data later shows lower averages than what the headset was showing me. Anyone know why this is and or how I can fix this problem.