Painting Pets Not Staying

I just bought the game. I spent hours painting my dog's coat exactly how she looks... as soon as I clicked away to save it reverted back to normal. Did it again, clicked away to work on another pet in create a sim, reverted again. Tested just to see. Every time I try and paint my pet it doesn't stay painted. It reverts back as soon as I click out of the paint menu. Really upset as I was so excited for the game and can't figure out why this is happening...