Everyone has their own way of doing things. In order to integrate them, you have to create your own way of doing things. Later, other people have to integrate your new schema with their own. It’s just the nature of working with many different companies
Impossible to say how the screenshot came about. At some point, the semantics of someone’s data was misinterpreted. Something was called a hard drive when it isn’t, something was treated as a capacity when it isn’t