If i have a globale discount on a product, Price vs list Price.

Then i add a customer with discount on severale of my products, why does it use Price and not list price ?

The customer then get global and custom price.

Is it posible to change this in a easy way.

if a user get discount in store all other offers is exluded

List price is intended to enable showing of discount amounts from “retail” or “list price” versus what you sell it for “price”.

Everything is calculated off of Price, that’s just the way it works. You can add users to groups and have those groups get differennt pricing.

I think you are confusing pricing with discounts and promotions. Think of price as the base from which all other discounts and promotions are computed.