Oops!
I have been setting my cell phone alarm rather than the bedroom alarm because it is a bit quieter, less intrusive to my sleep, and closer when it goes off. I've been doing this for over a week, without any problems. Last night, I was supposed to get up around 12:45am. Josh came in around 2, asking me what was going on. I said I was just waking up-I had heard the alarm about 2 minutes before he came in. He then told me the time-I had been hitting snooze that whole time! I guess the fact that I can't see the time as well on the cell phone made it easier for me to oversleep.
Luckily, it wasn't the alarm for the morning, though I doubt I'd oversleep that one. Of course, that is what I thought about the cell phone alarm...
I ended up just sleeping through the night. Well, that had been my plan until Keira woke up around 3:30. I guess the gods wanted me to sleep biphasically last night after all.