Another data point, not sure if that was before or after the Ah erase (probably before) :
Odo 87856
SoC 15,5
Lowest 3,655
Highest 3,730
Spread 0,075
Definitely before I touched anything with diagbox :
Odo 61164
SoC 10,5
Lowest 3,435
Highest 3,605
Spread 0,170