[Dual-Blade] No Cash-Shop Mastery-Books = No 4th Job Dual-Blade?

Hmmm I forgot Double Stab -can- go up to 20, so that's 10 less SP's from the total 25 I said before, but still, you'll end up with this:

lvl 10~120 = 330+2 = 332 SP's

20/20 Double Stab
20/20 Nimble Body
20/20 Dark Sight
20/20 Disorder

10/10 Triple Stab
20/20 Mastery
20/20 Booster

20/20 Self Haste
20/20 Fatal Blow
20/20 Endure
5/20 Slash Storm (No Skillbook = Maxed @ lvl5)

5/20 Tornado Spin (No Skillbook = Maxed @ lvl5)
20/20 Flash Jump
20/20 Flash Bang

0/10 Bloody Storm (Not Maxed Slash Storm = Maxed @ lvl0)
20/20 Advanced Dark Sight
10/30 Mirror Image (No Skillbook = Maxed @ lvl10)
20/20 Owl Dead
20/20 Upper Stab
5/20 Flying Assaulter (No Skillbook = Maxed @ lvl5)

Total SP's that can be spent: 315

Total SP's left-over at lvl120 = 332-315= 17

That Tornado-Spin is only 1x 20 SP's right? because in Fiel's skill tables is mentioned as 2 different attacks (3rd job lvl55~69)
http://www.southperry.net/showthread.php?t=24086
Does anyone know this?

But if it IS 1x 20 SP's you still have 17 too much SP's to advance to 4th job... :/