Well, I was level ten, but completing the first quest with the Warrior instructor caused me to level up before I could get my first job advancement. Now, I'm missing SP. Is there a way to reset this without creating another character? Is there a SP reset thing that would work for this problem?
Nope. There's no way to get back that SP, but once you max out Improve Max HP Increase, Power Strike and Slash Blast, you won't really need the extra 3.