Salvador has a total of 33 skills with 8 gamechangers

Axton has a total of 32 skills with 8 gamechangers

Maya has a total of 30 skills with 6 gamechangers

Zero has a total of 30 skills with 6 gamechangers

Does this mean the bonuses from Zero and Maya's skills will be larger to accomodate having less all together? This doesn't seem to be a case of the wiki not having all the info as everything checks out with all the sources available. So what gives? Is it all complicated math that my pea-brain would not understand or is there a simpler answer?