Confused about logged Fitbit details

I am confused about the Fitbit details logged: today I walked for about one hour and 50 minutes (with ashort lunch break in the forest). The 1.27 PM and 3.30 PM details may be correct. But what is the 47 minutes logged at the top of this screenshot? I always seem to have doble logs? This didn't happen only today, but I have similar 'double logs' daily. Any idea?

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