Revealing mistake: When Fry starts his speech with "I, Fry", the podium is casting a shadow underneath him, but he isn't. (00:13:50)
Continuity mistake: When Fry has a bite of his pizza slice, the pizza slice change size between the shots. (00:20:30)
Continuity mistake: When the everyone is singing and the Devil Robot is taking Bender down in the Lift, we can see that the back of the lift is grated in one close up shot, but in a far away shot it is a solid cube with no grate. (00:18:15)
I, Roommate - S1-E3
Continuity mistake: When Fry and Bender are furnishing their new apartment, Bender drops his cigar on the floor. It's still lit, but no smoke is coming from it even after Fry takes a puff. (00:10:20)
A Big Piece of Garbage - S1-E8
Continuity mistake: When the team first meet the Mayor, the writing on the Mayor's nameplate disappears after it is first seen, and the button on his desk that he pushes wasn't there before. (00:10:35)
Continuity mistake: When Bender starts talking about Clem Johnson at the baseball game, his bottle is empty, but in the next shot it is half full. (00:03:05)
I, Roommate - S1-E3
Continuity mistake: When Leela is complaining to Fry and Bender about being inconsiderate, there is a container on the wall with folders in it. When the couch gets pushed out the door, it's disappeared. (00:03:55)
Continuity mistake: Fry's bottle changes from being in his right to his left hand and the colour also changes when he's listening to the comedian. (00:11:25)
I, Roommate - S1-E3
Continuity mistake: When Bender goes back to his closet alone, the chain hanging beside the light bulb disappears after he closes the door. (00:15:50)
Continuity mistake: When Fry is sitting on the throne being goaded by Bender, the emperor in his stomach turns from light blue to dark blue in some shots.
Continuity mistake: When Fry is trying to buy the Z-ray from the salesman, the salesman has a red spot on his forehead. When Fry gets dragged away, it disappears, then later on it comes back. (00:03:40)
I, Roommate - S1-E3
Continuity mistake: When the landlady is trying to find the source of the interference, there is a pile of Bender's beer cans lying next to a pizza box, but when the team were watching TV beforehand, no cans were visible. (00:12:20)
Continuity mistake: When Hermes first brings in the package of lugnuts the address is on two lines, the "To:" and "Chapek 9", but after that shot the address is all on one single line, - "To: Chapek 9". (00:04:35)
Episode Two: The Series Has Landed - S1-E2
Continuity mistake: When Fry and Leela enter the barn, they walk past a wheel that wasn't there in the previous shot. (00:14:05)
Continuity mistake: At Fry's celebratory party, he and Bender are smoking cigars. Fry's cigar is smoking, but Bender's is not. (00:06:30)
I, Roommate - S1-E3
Audio problem: When Fry and Bender are pushed out of the door on a couch, you hear Hermes say "We'll bill you for the couch," but his lips don't move. (00:04:30)
A Big Piece of Garbage - S1-E8
Continuity mistake: When the Death Clock is put on the table, the readout panel is facing away from the edge of the table. In the next shot, it is facing Leela and the edge of the table. (00:00:35)
Continuity mistake: When we first see the team sitting round the table, Bender is sitting next to Leela. As the egg is burst with the syringe, we should see Bender in shot, but he isn't there. (00:01:45)
Love's Labors Lost in Space - S1-E4
Continuity mistake: After Zapp Brannigan shows off his 'big book of war', he returns it to a pouch at the side of his chair. Two shots later there is no sign of the pouch or the book. Also, when he gets out of the chair, there are no buttons on the armrests, but when he returns to it later, there are two on each side. (00:07:20)
A Big Piece of Garbage - S1-E8
Continuity mistake: The dagger and sheath on the boot of Leela's space boot only appears when she needed to cut off the elastic caught around his neck, and then disappears directly afterward. (00:14:10)
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]