MP Servo/OctQuad-xxx MAVGraph question

Good evening, I am using MP to diagnose a motor misbalance. However I am confused with the pre-set Servo/OctQuad math.
Servo/OctQuad-CCW mavgraphs2 plots RCOU.c5, C7, C9 and C11, (we only have C1 to C8!)
Servo./OctQuad-CCW-CW mavgraphs2 plots (Nothing!)
Servo./OctQuad-CW mavgraphs2 plot C6, C8, C10, C12 (Again we only have C1 to C8)
Servo./OctQuad-Front plots, C5, C6, C9, C10 (Again we only have C1 to C8)
Servo./OctQuad-Front-Back mavgraphs2 plots (Nothing!)
Servo./OctQuad-Front-Rear (C5 + C6 +C9 + C10) (C7 + C8 + C11 + C12)(Again we only have C1 to C8)
Servo./OctQuadRear C7, C8, C11, C12

So it this a mistake or is there something wrong with my logs?
Why trying to plot C9 to C12? There is no C9 to C12.
It there any way to edit MAVGraphs in MP? or make custom ones?

Thanks

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