Well, went back to the customers site today and was able to get it to follow a schedule, and/or be forced into manual night. Basically, one of my other techs had recorded a day greeting on user 1, prompt 819. Once I deleted that greeting and then turned off the prompt, it started working. However, it still won't follow the night button when set to pbx control. I verified DPITS setting. Customer is happy with this, but I'm still wondering why it won't work.