Alrighty. I understand how confusing this is. SO!
For the first 100 Stat Points, you have to pay 5 CP per Stat Point. SO. This gets you to 500 CP for 100 Chakra.
The next 50 are 10 CP apiece, making it another 500 CP for 150 Chakra, totalling 1000.
To go from 150 to 170 is 20 CP apiece, or 400. Making it 1400, meaning you have 600 left for your skills. You currently have 720 spent on Skills.
So we need to lose either 6 Stat Points, or 120 CP worth of skills to be at 0/2000.
Also, Stamina is Strength + Speed + JUTSU, not Defense. Simple fix.