So let me get this straight.
1. Supergirl relaunched with New52 and got her own solo book.
2. Then it got cancelled.
3. Supergirl: Rebirth happened and she got her own book again
4. Supergirl: Rebirth series ended with issue 20.
5. Bendis comes along and sets fire to Superman and Supergirl again
6. Supergirl now has a new book that spun off from The Man of Steel but isn't a new series cause it starts with issue 21.
What did I miss?