OK, so what I mean was that perhaps you might have had another Smart Action set up to disable Cellular Data but weren't aware of it, and if they were set to do the opposite, one might be waiting for the opportunity to take over once the other one was removed.
Originally Posted by Morydees
For instance, if you had one set to
WiFi Connection - Home Active = Cellular Data Off
and yet you had another that was set to
Display on = Cellular Data On
the second one might be the higher priority (I have yet to identify what ranks higher in priorities with the triggers but there must be some heirarchy), but once you removed it the first one with the lower priority would jump in and turn Cellular Data off again unbeknownst to you. Obviously if you removed ALL Smart Actions, that couldn't be the case.
Just a hunch.