Evolution calculation glitch and evolution patch demostration

If you have meet the requirements to evolve to 3 or more digimon at the same time, the game may do some of the calculations incorrectly.
This only happens if a digimon has a lower evolution score than the previous digimon.
I had all the techniques to always trigger the extra requirement. This biyomon has 0 care mistakes an 0 battles.
Evolution requirements, you need to fulfill 3 or more to trigger the score calculation:
- Birdramon:
* Stats required: 100 Speed (only 1 stat).
* Weight required: 15 -25 .
* Care mistakes: 3 or more.
* Extra: evolve from Biyomon or have 35+ techniques.
- Airdramon:
* Stats required: 1000 MP, 100 Speed, 100 Brains (3 stats).
* Weight required: 25 -35 .
* Care mistakes: 1 or less.
* Extra: 90+ discipline or have 35+ techniques.
- Kokatorimon:
* Stats required: 1000 HP (1 stat).
* Weight required: 25 -35 .
* Care mistakes: 3 or more.
* Extra: evolve from Biyomon or have 35+ techniques.
- Unimon:
* Stats required: 1000 HP, 100 Speed (2 stats).
* Weight required: 25 -35 .
* Care mistakes: 3 or less.
* Extra: 10+ battles or have 35+ techniques.
- Kabuterimon:
* Stats required: 1000 HP, 1000 MP, 100 Offense, 100 Speed (4 stats).
* Weight required: 25 -35 .
* Care mistakes: 1 or less.
* Extra: evolve from Kunemon or have 35+ techniques.
Evolution score formula:
Score = Sum of all the stats / amount of stats
*The HP/MP are divided by 10 before being added.
Evolution score formula glitched:
Score = (Sum of all the stats + old score)/ (amount of stats + old amount of stats)