Exact same thing happened to me this morning. I set the alarm on my iPhone and my girlfriend set hers as a backup. Woke up 45 minutes later then I was planning

Exact same thing happened to me this morning. I set the alarm on my iPhone and my girlfriend set hers as a backup. Woke up 45 minutes later then I was planning and was completely perplexed. Luckiy, I was not trying to catch a flight, just going skiing.