Ok. I've reverted back to the Story Manager. Let me to explain something:
My Gray Cowl of Nocturnal mod have the SM Event Node "Player Add Item" that fires a preparation quest if the player stole or pickpocket an item.
Now, some users (3 or 4 moment) had reported that the quest won't start, even if you steal a whole city. So, I've investigated and I saw the "Known issues" at http://www.creationkit.com/SM_Event_Node
The yellow part is the new thing I had to keep in mind. So my situation is something like this: https://www.dropbox.com/s/w7brvhttfluobde/sm.jpg?dl=0
As you can see, my quest node is on top as suggested on the wiki. Also the vanilla WIAddItemNodes doesn't have the "share events" ticked. I thing this will solve the issue for that 3-4 users because I suspect they have other mods with the same SM event node but no "Share Events" enabled.
There is only a thing now: The WIAddItemNodes branch is now marked as *. It will be safe to work?
TES5Edit report this: https://www.dropbox.com/s/qe0d28l3a7917lx/tes5edit.jpg?dl=0
It seems to be an "override without conflict".
Thank you.