Can dual blades save points between jobs?

Let me just make this clear. Is this about having too FEW skillpoints or too MANY skillpoints? Because last time I checked, they don't let you job advance only when you haven't spent all the pre-4thjob SPs. If you purchase the CS 3rd job skillbooks and somehow wind up with 1 too many skillpoints, you just raped yourself, but if you don't purchase, you'll have even more points left over. Solution? Non-CS skillbooks.

Unless all that was just a bluff that I fantasized for my own amusement during the boredom period.