Christie is blowing up her alliance and is completely oblivious to it
To recap, yes, Jack pushed her too hard. You have to understand who is the one who has the HOH key. The only thing that matters in week 1 is that you make as few enemies as possible, and now you've already got a schism of your alliance of 8.
Christie never seemed to go to each of her alliance people about what she wanted, and as we know, someone else it what on board with her. Instead she went around about people who aren't in her alliance about what she doesn't want to do. Has no idea she exposed the fact she's in an alliance of 8 to Nicole.
She also totally forgot that she's supposed to be in a fake alliance with Ovi, who also knows there's an alliance of 8 out there. Now he knows that he isn't.