Villagers not going in houses

I have a village in minecraft and villagers do not like the houses I have made them. They bunch up outside the houses at night in the open. I know they see it as a village because they stay by it and there is a golem. If you would like to see this for yourself here is a world download: https: https://drive.google.com/open?id=0B218FJohL-ZQfllaT1ZHRzY5S2JFZDQyN0V4dkRNbnAxeXhwdmZaZU1HWWtSRUQyWXVuVUE&authuser=0