Dillon rides into camp on a black (dark colored) horse. In the morning after not leaving camp, he is on his normal cream colored horse for the rest of the show.
It is soon after sunrise when the Kiowa kidnap Ed Vail's daughter. He and his two sons decide to go after the Indians, and his wife insists that they bring the reverend with them. But it is night time by the time they arrive at the reverend's tent. So, now they have to go all the way back to try to pick up the Indians' tracks. They could have just set out right away to follow the Indians.
After Vail's wife goes into Dodge to tell Matt about the Indians taking her daughter, and that her husband and sons have gone to try to get the girl back, Matt goes to find the men to help them, but he goes alone, instead of asking for others to go with him.