Hi. In my 66-hour long Krastorio 2 world I started getting Lvl 8 nests and enemies... the problem being is that I'm not supposed to. My ending level is 7 and was so throughout the entire game. Why is it like that?

Screenshots: https://imgur.com/a/3fAO0rL
Save file: https://drive.google.com/file/d/1TlAfREqAIXam4E2Ivet8LpmKV5utvG-2/view

This is a frequently asked question
A lot of people think that "ending enemy level" affects the level of biters, nests or factions. As it is written in the explanation of this setting - it is just the level of health and related parameters at 100% evolution. So, if it's the default level (5), a level 10 biter will have 1000 health. If, for example, "ending enemy level" is 9, then 15000. Of course, this is the "base" health, which can be changed by faction-specific modifiers.

if you want, try changing this setting in the save and compare how the health of your 7-8 level biters and nests changes