Good morning.
I was trying to see the bone armor stats on max roll and I noticed that all the skill points to the ability through equipment, do not raise the value of the shield. only the points actually given.. is it a problem of the site or is it really like that? because it changes so much in my character

I am 99% certain that +skills do not work with the synergy between the three skills, only hard points does that. "Sad but truuu-uhuue!" ^^

Looking at max roll for anything is only going to give you bad information. That terrible site is littered with wholly wrong info and causes people that don’t know what they are doing to reach wrong conclusions.

As a rule of thumb, just use amazonbasin for anything d2 related

https://www.theamazonbasin.com/wiki/index.php/Bone_Armor

Interpretation and Perspective, I could say Quorra would be a better source of information on D2 related things. Including links.