Parking Light Question

[curvedglass]

Not sure if this is a real issue or the actual design of the truck.

I noticed that my parking lights only light up when the switch is in 'parking light' position. When I light up the headlights, they go out.

LikeI said I am not sure if it is supposed to be this way. I was surprised to learn that there was only one dash light for both turn signals. I thought there was a short and took out the bezel. Doh! That's one way to learn.

Kinda like backing up in the dark without reverse lights(optional).

Any help or educational ridicule accepted!