The Set Up - S2-E13
Continuity mistake: As they are celebrating April becoming an assistant, her drink is dark red (probably wine) and in the next shot suddenly becomes a bubbly yellow (probably champagne), and in the next shot turns back into a red liquid. (00:20:55)
Continuity mistake: When volunteering with Kaboom, Leslie says they are building in Eagleton, which she describes as "two towns over." As the show continues we visit the Eagleton/Pawnee border and the neighboring towns become a plot point for many episodes. (00:01:35)