Confused Singa

In Episode 15 SjangTang falls and it's Chung's fault. Before Chung gets beaten, Argaï is able to stop Sjangtang. Later in that Episode they all go to the house of Chung's grandfather: Singa. Although he should have seen what happened in the city, he acts like he didn't see it and says: "Chung told me what happened." Well, he saw it himself! Maybe forgot?