- Edited
Tomoyuki It shows 8th and 10th because of timezone differences i would assume. I probably checked in early morning for the first day, and then late night for the second day(or maybe the other way around), so it shows like it happens in 3 day span. I know it doesn't make much sense from the times shown but that is probably what happened. I doubt it is logging my local time. As you can see, the expiration date is shown correct, since timezone difference doesn't matter to the expiration date.
This is another example, 2 weeks before from now i think
Daily check-in +11 Android 2019-12-07 19:24 Expire on 2020-01-06 19:00
Daily check-in +50 Android 2019-12-07 19:23 Expire on 2020-01-06 19:00
Daily check-in +15 Android 2019-12-07 19:22 Expire on 2020-01-06 19:00
Daily check-in +8 Android 2019-12-06 19:47 Expire on 2020-01-05 19:00
Daily check-in +15 Android 2019-12-06 19:00 Expire on 2020-01-05 19:00
The +50 check-in is the 7 day consecutive check-in bonus, while the others are weekend check in (+15) and their multiplier bonuses.