I'm a little unsure about the specifics of that transition.

Story has it that Maranzano promised to make Lucky his underboss after taking out Masseria. Yet whenever the original 5 families are discussed, The Luciano family is listed as one of them while along with the Maranzano family.

When exactly did Luciano go from Maranzano's underboss to the head of the Luciano amily? Or did Luciano never actually become Maranzano's underboss and instead Maranzano changed plans and had him take over the Masseria family?