I've noticed that when you are charging the device it does not ever go to sleep so your up time and awake time will be equal if you check it right after charging.
Compass calibration seems to be a hard piece of information to find. I've noticed on my device that the compass seems to loose calibration from app to app. Say I calibrate the compass inside GPS Status then close it and go into LAYAR. The compass will be messed up again. So I've found I have to recalibrate it anytime I open up an app that uses it. Has anyone else found this to be the case? BTW here's a good video showing how to calibrate the compass in these types of phones: