The good news is that your Da Recco is crippled and shooting at a crippled ship, so the penalties cancel out. Your first shot sinks Milan 2. Then you've got the concealment roll for its torpedo, CD hit Suffren 1, Gorizia 2 sank Milan 3, Suffren 3 hit by Gorizia 2. That's the same as what you came up with but if your torpedo hit then you also sank Suffren 1.