What I noticed with TCOYF is that if the time is an hour and a half earlier or later than normal, they won't adjust it. Someone on the boards suggested to discard, but I just left them since I didn't want all those X's on my chart

. That being said, I did notice that on the days my temp was taken way out of range (like a 2+ hour difference) they couldn't be trusted. I normally temp at 9a.m., but when I charted at 6:30 a few days, those temps were higher than what I expected since I woke up earlier.