User blog comment:Broodje Kroket/Theory: Did Sadie change Courtney's personality?/@comment-25285054-20141106203427

What actually happened was, because of Harold eliminating her, Sadie doing that, and not making into season two, and watching Justin's terrible attempt at antagonism from at home, she had an extreme temper tantrum that lasted for the entirety of TDA

Though don't forget that she was her TDI self for the first half of TDWT