Were you under the impression people are saying this is a bug? Yes, the fact that ranges overlap from two grades away is bull.
Why exactly?
Given that Grade 5 outcomes are already significant in their ceiling limit and their bare minimum is pretty significant as well, the only real thing that I can imagine is being argued is that grade 3 and lower modification ranges should be.... lower? So that they can't overlap with a grade 5 and it's nothing but a definite gain because modifications a few grades lower have had their potential killed.
Buffing grade 5 ranges in the example given, even if it's just boosting the minimum would just make the modification offer a short range of guaranteed 32%+ gain no matter what (to anticipate against any possible secondary effect a lower grade modification might get which would immediately make it "" by your standards), and that would be silly broken.
Last edited: