When Andy goes crow-shooting, he invites Karen Moore to come along. Andy misses the first two birds and, embarrassed, says that his shotgun must need new sights. Shotguns don't have sights.
Andy clearly calls Karen Moore "Sharon" when he realizes he'll be competing against her in the skeet shooting competition.
At the coffee shop, Thelma Lou calls her cousin "Karen Woods" although her last name is supposed to be "Moore".