Academy system (2020.9~2021.9)
Due to soldiers only get another retraining point if xp >3200. But lv2 only requires 1600. So many soldiers can get over 1600 xp without trigger a retraining point.
After a update in OBT, academy can save the remained soldier’s xp. But academy won’t trigger the star’s level up. So, a soldier’s xp can overflowed in this situation.