I think it's that when I rememeber the film, I remember it in sequences, not as jumping between things.
If I think of the Endor forest scenes, I can go straight through them in my head from the landing to Han and Leia kissing and Yub Yub. I don't recall when the stories cut from one to the other.
Just putting them in order took all of my brainpower.
Also, as a kid I had a VHS copy taped off of HBO that started with C3PO and Artoo walking to Jabba's palace, so I never even noticed that the first scene of Vader arriving at the DS wasn't on the list.
This has been great fun.