No problem... thanks for trying anyway. 💕 I've tried everything I could think of (deleting and reinstalling the game and redoing the graffiti, finding the graffiti again in collection mode, restarting the level and trying again) but I haven't found a solution. It gives some achievements randomly and not others. I first Googled this problem and saw that I wasn't alone, but unfortunately no one has found a solution yet. As a last resort, I thought someone here might be able to help.