I am very very confident that this is as Hepcat suggested. Merely another day's shoot. The producers would never pay attention to detail enough to intentionally make each film splice differently to introduce a clue about why they would be different. During the "making of" of Lost Season 1, they said that people on the internet were very quick on criticizing a bad shot of a polar bear attacking, and that they had to reshoot that scene for that reason. I really think that in the game of nitpicks, we (the internet folks) are ahead on them (the producers), meaning that, more often than not, if a small detail can be explained away as either production difficulty or clever hint left by the producers, it's going to be a production difficulty.
In fact I am almost sure that the person in charge of continuity was on the ball on this one, but just had too much trouble retying the tie at exactly the same spot for the stripes to match. Also it looks like the aging techniques used for the film were not correctly duplicated, and they had to start over to approximate the effect as much as possible.