My throttle is assigned to the Z axis, as it should be. Editing the axis confirms this.
I even attempted setting JOY_SLIDER1 to prop controls, however, when I start any mission my throttle does nothing and the JOY_SLIDER1 controls the plane's throttle, but inverted.
EDIT: Also, I attempted to take a screenshot but it didn't work. I'm -semi- familiar with configuring input devices for other sims or games, but this one defies my logic.