Probably means your switch is bouncing. If you purposely hit that switch twice, you'll get the same effect. Basically there is no difference between hitting the left bottom or right bottom of the ignition switch. Both sides toggle between "off" and "accessory".
If you feel you are only pressing the bottom of the switch once, then you should see your dealer and have the switch tested.
If you feel you are only pressing the bottom of the switch once, then you should see your dealer and have the switch tested.