I see the problem, and it’s nothing that you’ve done.
The EN pin on the Notecarrier-AF was originally designed to power down the entire board. As you now know, you don’t want this behavior when you are trying to use SleepySensor.
If you are comfortable modifying the hardware, you can cut the trace between the EN pin and the button, as discussed here. If you have an exact-o-knife, it is a snap!
I’ll DM and see if I can’t help fix your hardware situation.
Cheers,
Zak