Why is it that many of the changes were so poor with continuity between the old and the new stuff? Having the wrong Stormtrooper helmets during the “Look sir, droids!” scene, having new open windows in Cloud City in some shots, but not in others, even if they’re supposed to be the same ones, having Jabba’s palace door apparently be bigger on the outside than it is on the inside, etc.
Because the Special Editions were done after-hours between projects with no guiding hand other than Lucas himself who only seemed to care about the shot being “fixed” at the moment and not the shots around them. Remember that Lucas only wanted to see if they could do something he wanted to do in the prequels, and if they could he just moved on. Then there’s things like the SE Boba Fett’s both having wrong pieces of armor because BOTH scenes were “that sounds cool, let’s shoot that this afternoon” and they were done years apart (December 1994 for ANH and July 1996 for RotJ)