Kate shows up 45 minutes late for work. She rushes up the sidewalk to meet Barry and their group, but she is wearing a totally different outfit than she was wearing when she left her apartment to go to work.
When Kate is trying to make Angie take the big orange vitamin, as Kate hands water to Angie, Angie removes the vitamin from her mouth, in the same camera shot, Angie spits out the water (without putting the vitamin back in her mouth) - and as soon as spits the water out she shows the vitamin in her mouth.
When Kate is looking at places for the new store to be at she goes to "Super Fruity Smoothies". When she goes to order there are paper menus and the top one is uneven with the rest. The shot after next it looks like it was rearranged.
When Kate and Angie go clubbing, the shrug sweater over Kate's dress keeps changing position. Her shoulders are visible, then covered by the sweater. This continues throughout the scene, but is especially visible when Angie throws the garbage can on Scott's car.
Angie would never be able to be a surrogate without having a child of her own first. All reputable surrogacy agencies in the US require their surrogates to have had at least one full-term, live birth before becoming a surrogate.
Angie cannot open the door to Kate's "space car," an Audi A6, because it is locked, despite pulling the door handle several times. If an Audi door is locked, the first pull on the handle from inside unlocks the door, and the second pull opens it.