Look around on ebay for JL or JLU window switches and look at their pictures. This is pretty normal if they get used a lot.
I put purple caps on the window switches in my wife's JLU (you'll never guess her favorite color or the color of her Jeep)
When I finally get new switch levers made for her, that will resolve this little issue.
It's common from the looks of the used switches for sale out there.