Unresolved

Does the - count for car stats

Hello, new to this game and kinda struggling with the car setup (so acceleration, braking and such).

When I get an upgrade point and use it I see different stats then when I look at my car's breakdown. So for example, the whole time I had 1 as fuel management(looking and the breakdown chart), but if I push upgrade I see it is -8. So my question is, does the -8 count or is 1 the lowest it will go and is there no disadvantage beyond that?

I believe 1 is the lowest it will go and there is no penalty beyond that but to get it to 2, you would need to invest 10 design points in that attribute or else change the supplies that are contributing to the negative affect.