C&T: Mislead by Dawn?

As I keep reading/watching videos regarding the adoption of C&T's bio daughter, wouldn't the main cause or the root of this situation be Dawn's fault? C&T won't say that it's Dawn's fault because they feel that they owe her for her involvement of organizing the visits/messaging back and forward with B&T.

Yet, Dawn knew that each family (C&T and B&T) had two complete different ways of how they wanted their adoption process to go. Obviously these two families should have not been involved but I feel that Dawn should have carefully looked into what each family wanted when starting this adoption.