I think they get Read and that may be it. It sort of counts as it's own Major and Minor. I could see it being that you get Read and one Minor. Then your second purchase would be the matching Major and two new Minors. And if the player is spending that much advancement on Sorcery advantages, I would probably allow the last purchase to cover TWO Majors if they have all the Minors.

Looking at page 228 in the book, your first purchase of the Sorcery advantage (1 rank) gets you the following: Read, two Minor Weaves, one Major Weave.

It may look like you're getting a lot up front for those 2 points, but I think that's counteracted by a Strega being required to spend a Raise to use Read before she can use any other Weaves, and that all Read itself does is prep the character to use their other Weaves during the Scene.

I was totally wrong on that. The list on 228 is a cumulative total. So you should have whatever matches the line for the ranks you have. So a starting background stress has two sorcery ranks and can Read, 3 Minor and upgrade 2 of those minors to Majors.

I read it the same as Salamanca above.

 

Taking Sorcery Advantage for Sorte once gives you the Read Weave, any two Minor Weaves, and one Major Weave corresponding to one of the Minor Weaves already taken.

Each subsequent Sorcery advantage adds one Minor Weave, and one Major Weave corresponding to one of the Minor Weaves the character has taken.

Technically, you don't get a Minor Weave for the fourth Sorcery Advantage taken, but I'd guess this is probably due to the fact that there isn't a fifth option for you to select from (yet).