Sharon and all her coworkers get shot at while they are in a diner. She chases one of the gun men down, and during a struggle she loses her gun. He picks it up and shoots her in her left shoulder, she has a bullet proof vest on so it doesn't hurt her. After that scene they are in a bar and she goes to the bathroom, she looks in the mirror, then the camera bans to face her and the bruise is on her right side. Then when Catch comes to visit her after she stood him up she's wearing a tank top and the bruise is now on her left side, and her right side is just fine. I think someone got confused with directions.