Why I didn’t get full points for daily task?

Many tasks require you to do something more than once. Look for the 'Completion: ' number under the task heading and also tap on the task for a pop up that give more details.

Kill a zombie in the city is usually worth 6 points total and has 3 stages with points awarded for every 3 kills. so you need to kill a total of 9 zombies in the city to get the 6 points.

Kill Zombies task is to kill zombies in the world map. This is worth 25 points in total with 5 stages. 5 points for each kill. So hit 5 zombies to get all the points.