The vehicle has one transmission.
Perhaps you and your questioners are referring to the dual-clutch?
If so, that is part of the one and only transmission. You should look it up if you want to understand how it works - which is pretty cool, BTW.
In short, a dual clutch transmission enables near-instantaneous shifts between gears by allowing the next gear to be pre-selected, so that shifting gears is just a matter of disengaging one clutch while simultaneously engaging the other clutch.