I have an iPhone5,iPad 3 & my daughter an iPod Touch 4th generation. We use Do Not Disturb. It turns by itself at 9:30pm & off at 7:00am. This morning, none of them turned off automatically. I manually backed them up to iTunes yesterday. Any thoughts?

I have an iPhone5, and an iPad3 and my daughter has an iPod touch 4th generation and her and I have separate accounts. I backed them up to my PC to iTunes last evening as I do every few weeks. We both use the Do Not Disturb option. Quiet hours are from 9:30pm to 7:00am. The 3 devices always turned the Do Not Disturb on and off according to the schedule on their own. As of this morning, the Do Not Disturb did not turn off on any of the devices. I sync them with iCloud either manually or when charging them. The moon icon stayed on all day today and did not follow the schedule. I had to shut it off manually on my phone. Any thoughts. My daughter initially had used her iPod Touch under an Apple account I made with my information. When I got my iPad and then iPhone5 I created a different account for her. Some items of mine went on her iPod Touch yesterday when I backed them up on iTunes on my PC. Any help is greatly appreciated! Thank you!