2. Client is forming an S corp. He went to We the People instead of the attorney I recommended. They registered with the CA Sec State, which looks okay. They gave him a binder of the usual documents, without any names listed, nor signatures, which does not look okay.

The client isn't knowledgeable in the areas of taxes and legal issues. Example, he doesn't know if his spouse should be an owner or not?  I have tried to guide him but IANAL.

2.  What document officially and legally determines the ownership?  Is it the articles of incorporation or the 2553 or both?  And owners on both must match right?

I will tell him again that We the People doesn't give me confidence.