Could you please help me with this?

To begin with, sorry for the very long post.

As a couple (1) start to form a relationship, they can be seen to develop a set of constructs about their own relationship and, in particular, how it is similar or different to their parents’ relationship. (A) The couple’s initial disclosures involve them forming constructs about how much similarity there is between them and each other’s families. What each of them will remember is selective and coloured by their family’s constructs system. In turn it is likely that as they tell each other their already edited stories, there is (B) a second process of editing whereby what they both hear from each other is again interpreted within their respective family of origin’s construct systems. The two sets of memories—(C) the person talking about his or her family and (D) the partner’s edited version of this story—go into the ‘cooking-pot’ of the couple’s new construct system. Subsequently, one partner may systematically recall a part of the other’s story as a tactic in negotiations: for example, Harry may say to Doris that she is being ‘bossy—just like her mother’. Since this is probably based on what Doris has told Harry, this is likely to be a very powerful tactic. (The rest omitted.)

From what I think, I believe (C) refers to (A), and (D) refers to (B). Am I correct?

And in (1) the text read 'start'. Is this a typo, or acceptable by any means?

Thank you so much.