Why does my Macbook still sleep with sleep disabled

I need to use my MBP as an alarm clock. I have the energy saver settings set to never sleep while plugged in. Last night I left the MBP plugged in, and even enabled Caffeine (supposed to prevent all automatic sleep processes) and Nosleep (prevents sleep upon lid close) apps, AND used sudo pmset autopoweroff -0 (this prevents automatic safesleep/hibernation after a certain number of hours). I woke up early this morning, checked to see if the computer was awake, and much to my chagrin, it was asleep. Does anyone know why this still happens?