That's the way it seems to work for me, too. I was once selected for jury duty, but they kept postponing the trial, and I eventually moved out of town. I've never been called since.
I actually wanted to serve on that jury. I'd been the ranking officer on a court martial once (enlisted man caught in a drug bust), and I wanted to compare a civilian jury with a court martial.
My wife was called to serve on a jury, but somehow they overlook me.