Original look but not new

So I added a Sim from the Cupid dating app and I changed the look of the person and every time she leaves to go somewhere she goes back to looking how she did before I even changed her. Plus, it keeps having her shower with her clothes on. then if I want her to go back to looking how I changed her, I have to go in to create a Sim every single time and back out for it to make her look like how she is now instead of looking like how she did when I added her to my household then when she is how I changed her say that I want her in a certain outfit it will say she’s in her party attire, but then she’s still in her everyday clothes