Why is my fuel pump duty cycle chart become so jagged?

[zxmarekxz]

In the upper rpm at wot we noticed this while tuning the car for the addition of a Paxton. Attached a picture of what I mean

Car:
07 gt
Frpp aluminator at 9.8
Stage two head job
127300 cams
Frpp manifold
Full catless exhaust
2200 Paxton 3.33 pulley making 12.5lb at 7k rpm
Frpp timing kit
Frpp lash adjuster kit
Gt500 fuel pumps
60lb injectors
Rails appear to be stock, I think...