Yeah, the transmission programming in this car and how it responds to throttle input are a bit strange. The transmission in stock format locks out 3rd gear at pretty low speeds, and the car shifts at low RPM with long slow shifts. Part of the problem is that the HP actually drops off after 5k RPM and the slow shifts are probably for comfort, the other part is puching the throttle all the down seems to make the car slower (it's better to roll into the throttle). But a lot of this should have been improved with your tune, the HP and torque have gains into a much later RPM range, the shifts are much more firm, and you should be able to hold gears longer. I have a different tune installed but it made worlds of difference it how I can get the car to respond.