Continuity mistake: When Miranda introduces herself to her friends at work, watch the woman with the cookie: her left arm's position and how the cookie is bitten keeps changing in every single shot.
Continuity mistake: When Chrissy and Lois are in the car before going into the meeting, the passenger side window is down, but not all the way. But in the next shot when Chrissy steps out, it's all the way down.