Nope, some of the truck switches are wired that way. If the switch has a small handle built into the lock cylinder, the ignition is "off" when turned full clockwise, "on" when in the center position with the key vertical, and "off and locked" when the cylinder is turned fully counterclockwise with the key inserted into the cylinder. The key can be removed in the off or run position so the vehicle can be operated without the key inserted into the lock by simply turning the handle. It is necessary to have the key inserted into the cylinder to go to the "lock" position and it stays there when the key is removed. The 1958 model school bus I rode for 3 years back in high school worked that way, as well as several big bolt trucks I've worked on. Some fleet trucks had several vehicles keyed alike so a foreman only had to keep up with one master key.
Jerry
