I didn't know what to do so I just kept switching the thing back and forth and it finally shut off. Then I noticed my dash lights would barely flicker off and on with the key in the off position. Luckily I had just got home and was not on the road somewhere. So, I decided to wait till the next day to look at it. When I tried to start it the next day, my battery was dead.
After taking apart the key cylinder, I learned that the switch is actually down the steering column. The cylinder is a mechanical gear and rack type assy that moves a rod that actuates the switch further down the steering column. After removing a few bolts to lower the column, the switch is on top, held by two bolts, nestled in the little cove of the dash. $8.00 part, easily swapped. You just have to adjust it to match the key movement.