Sleep tracking is not accurate on Galaxy Fit 3?

[AlanSlade]

Good morning everyone. 

I noticed that my Galaxy fit 3 is not very accurate on tracking my sleep. 

Yesterday I went to sleep at 10:45 PM, and it started tracking my sleep from 1:00 AM. It's not loose on my wrist, so the monitoring should be accurate. Anyone has the same problem? 

 

[akorejepadeknight]

Did you start sleep mode on the GF3 manually or by Modes or did you let the Fit3 auto detect your sleep?