I do this for living, (HMI - Human Machine Interface)
It drives me nuts when I see inconsistency. My 2001 Mirada was same way.
Generally UP or RIGHT is ON and DOWN or LEFT is OFF.
My big one was the entry step switch. Press the top of the switch to lower the steps, press the bottom of the switch to retract the steps--- URGH.
I not only changed the switch (Top to retract, bottom to extend) but also its location. It was down low and to turn the switch on from the inside meant a somersault down the steps.
Relocating entry step and porch light switches | 2001 Coachmen Mirada 300QB
OH YAH - The Generator switch is also backwards - Press on the left side to start, and press on the right side to stop. This is backwards from industry standards.