The length of Theresa's cigarette when she tells Lorraine that she has decided not to go to the party at the night club. This happens at the same time that the block party is going on outside.
During the second tenant meeting, Olivia Cole is not wearing her age makeup.
When Theresa is throwing the meatloaf ingredients at Miss Sophie's window, we see her hold up a jar of olives and its liquid. But when she throws it at the window and it shatters, there is no liquid shown.