If we watch the movies in #1-#6 order, what doesn't make sense?

When TPM makes a big deal about R2 and Threepio meeting. If that was the first film, there'd be no reason to even show that dialogue.

Jabba in TPM. Without prior knowledge, it seems that big worm dude is the mayor or something. County racing commissioner? The owner of the track? Why is he there?

In AOTC all the lil younglings are wearing blast helmets and fighting remotes. Three movies later ObiWan has that exact equipment on the Falcon. How did that happen?