Deliberate mistake: In the dorm room, Fry's punch cup appears out of nowhere. [According to the DVD commentary, this was done on purpose.]
Futurama (1999)
1 deliberate mistake in season 2
Starring: John DiMaggio, Katey Sagal, Tress MacNeille, Billy West, Lauren Tom
Continuity mistake: When Fry first meets Leela, there's a panel on the wall beside him. It has one red button at the bottom. In subsequent shots it has two buttons. (00:03:50)
My Problem With Popplers (a.k.a. The Problem With Popplers) - S2-E18
Fry/Bender: Pop a Poppler in your mouth, When you come to Fishy Joe's, What they're made of is a mystery, Where they come from, no one knows. You can pick 'em, you can lick 'em, You can chew 'em, you can stick 'em, And if you promise not to sue us, You can shove one up your nose.
I, Roommate - S1-E3
Trivia: Bender's apartment number is 00100100 which, on the ASCII chart, is a Dollar sign. (00:05:35)
Answer: Yes Leela knew from early on that Fry had feelings for her. They were pretending to be a couple in 'A Flight to Remember' from season 1 and Fry tried to get on dates with Leela ever since. She just didn't show signs of the feelings maybe being mutual before some of the later episodes.
Andreas[DK]