Ai prime questions

[tmac18]

Hey guys and gals, i just purchased an ai prime from my local reef store. He changed lights so he sold me one of the ai's he had in the back. I had to do a factory reset but hot it working. For now i put it on a ten gallon tank i have but its home is going to be on a 20x20x20 cube. When i plugged in my light schedule everytime i shut my phone off or shut down the app i go back to the schedule screen and its back to 8 am. I work nights so i want this coming on at night say...11pm and shutting off at 7 or 8am. Any words of advice? What settings should i use? Very confusing. I have no manual. Thanks