Hello. Today I've notice too much deficit in charts and was very surprised, because I've started to sleep much more than before. I've checked sleep graphs and found almost all of them have wrong duration.
For example, my today sleep is from 22:20 till 6:30 and it should be 8 hours 10 minutes, not 7:06. Other days have errors too:
22:48 - 6:13 is 7:25, not 7:16.
23:33 - 6:01 is 6:28, not 6:14
and etc.
Sometimes it's a big difference between real sllep time and duration in the program, sometimes it's small. Is it a bug or I understand 'duration' wrong?