A) Why would anyone need to know when their last charge was?
2) I'm guessing if this is the real software that the firmware had some kind of an update done that resets some numbers but not others. IE: Charging time reset to zero, miles added reset to maximum value (and likely the total range as well). kWh added was not reset. My Bolt EV would lose the trip efficiency numbers from a firmware update but not the trip meter.
On my i4 I have on the BMW application the distance run on each trip, the kwh by charge and can get the total cost based on the tarif at home. I have the summary by month and the year to date.
