No, the variable option is for features, not for skills.And if the option is set to false, no skills of the secondary class will be learned? Is that what I get from what you said? Or will skills be learned no matter what?
Skills and features are not the same, although you can theoretically learn skills by features.
Just look at the element titles in the editor: features and skills are different areas, and you can see on the titles which options are affected by the skill.
