Continuity mistake: When Jack carries a drunken Tess up to his apartment after their first meeting and he unlocks the door, the lock is on his right. When he opens the door, it opens as if the lock is on his left.
Suggested correction: It only appears as if the lock is opposite because Jack is standing to the left of the actual door not in front of it. When he walks in he would be moving right to walk in.
Plot hole: We see Tess wearing Catherine's clothes when Catherine is gone, but Catherine is much slimmer than Tess. They wouldn't fit without being altered and she had no time to do so.
Suggested correction: Katherine is also taller than Tess. The same size could fit a taller, slimmer woman and a shorter, less slim woman.
Continuity mistake: The timing of the ending is all wrong. First, we see Tess at Cyn's engagement party; then, no more than a week or two later is the business meeting where Katherine storms in and "outs" Tess. We then next see Tess at Cyn's wedding, a perfectly planned affair with fitted bridesmaid dresses and everything - implying that some time has passed, since it takes much longer than a few weeks to pull a wedding like that together. This seems to be bolstered by next seeing Tess going back into the office to get her stuff back, and Katherine's broken leg is now out of its cast, and she has a cane. BUT - Tess goes back into the office to get her stuff, which would imply that only a few days at most has passed - who leaves their stuff very long in an office where they've just been fired? Also, she runs into Katherine putting the finishing touches on the deal - it doesn't seem likely that the deal, which was agreed upon in the meeting, would take very long to be finally finished. The business world as depicted in the movie moves very fast.
Suggested correction: There's no indication of how much time has passed. I didn't perceive the week or two you referred to.
