signing the mortgage papers
Julianne Moore's character seemed as smart as a whip (she had to be to win all those contests). So why didn't she sign the mortgage papers along with her husband? She knew she was supposed to, she even said it. And then she got talked out of it so easily (by the way, that's malpractice by the loan officer). The scene was believable at that point in the movie but at the end I couldn't believe it was the same character who made such a dumb move.
Now maybe back in those days it wasn't customary for a woman to sign (I don't know for sure, I wasn't around), but her husband and the loan officer didn't seem like they cared either way. I know it's a true story but it really seemed almost like a plot hole or something.