Mr. Handy said:
The situation with the zombies in the grass may not have been fully clear in the story. Alanen's position is 50 yards southwest of the motel, but not due southwest (more west than south). From where Cole is currently, about 30-50 yards east of the motel, the building blocks his line of sight. He had moved earlier to get a better line of sight on the zombies to the north, and he probably moved further west at the time, which means the motel would further obstruct his view of the grass. In order to see the zombies, he would need to move south for a full round. Until McCain announced them, the only person who had been aware of their presence was Ortega, so he wouldn't have known about them yet, but we can say he and Luke took their actions after McCain warned everyone. Cole would not have been able to fire this round even if he had not lost it.
Luke is even further away. The motel and the diner are about 100 yards apart, and the diner itself is over 40 yards across, which means the zombies are more than 200 yards away. Since his rifle is scoped he can see them, and he can easily fire without a range penalty, but he has to move to the south in order to do so. Cole's movement may have alerted him to the danger from the west, so he can do this, but again it takes a full round to move to his new position. Otherwise he would have had no way to know about the danger from the west. His shot will thus take place next round, which means he does not get any further actions after the next major update. The zombies will get to go before he fires.