Fitbit data is not synced correctly

The Fitbit email address and WellGo email address may be different.
Try the following:
1. Start FitBit app > Tap Account icon on top-left.
2. Account Setting > Change Email address > Note the shown email address
3. Start WellGo app
4. Tap … menu > Setting > Lofelog location
5. Turn off fitbit
6. Turn on fitbit again and authenticate with the email address noted at #2