I’m having an issue with my Schlage Camelot lock as well. Hooked it up fine to the ST network, was able to control it by the ST app with no issues. Came home the other day and although it was “in” the app and it showed that the lock was locked manually a few hours ago, pressing the unlock option on the app did nothing. I unlocked it manually with a code, the ST app showed that the device was just unlocked, tried to lock it with the app, nothing.
I followed the steps outlined above, was able to unroll the device from ST, it no longer shows up in my device list. Factory reset the lock, re-programmed the user codes and now I can not get the lock to enroll back onto the ST network.