Continuity mistake: When it's Nibbler's birthday, in a far away shot of Nibbler in his chair, the three balls on it are pink, but in the close up they are green. (00:04:20)
Continuity mistake: Right at the beginning when Leela is opening Nibbler's food, there is no pipe connecting to the microwave, yet when Bender is attacked there is a pipe. (00:00:55)
Continuity mistake: When the vet is examining Nibbler, there is a table next to the operating table right in the first shot, but when the shot changes it is no longer there. (00:02:15)
Continuity mistake: When Fry, Leela and Bender are in the mutant village they walk past a building which has the sign on it "Dry Cleaners." However, when the shot cuts to the close up, it has suddenly changes to just "Cleaners." (00:15:40)
Continuity mistake: Leela's shirt gets fixed when she picks up Nibbler after they defeat the Chupeneabrea. (00:25:45)
Continuity mistake: When Bender is making the cake, when he gets the ingredients from the fridge, there are a lot fewer items when the shot changes. (00:05:20)
Continuity mistake: When Fry, Leela and Bender goto the vets, when the veterinarian comes out the door is open but when the shot changes it is closed. (00:02:05)
Continuity mistake: When Bender is watching television with Fry, in the background you can see the dart in the background is on the top half of the board in the wall, but when the shot changes it is in the bottom half of the wall. (00:10:00)
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]