We also noticed 9 Special Edition pictures and sound effects in 4K83. We immediately cut them out and replaced them with 2006 Bonus DVD clips.
Sorry, but that is impossible. I don’t know what you and your friends are seeing but 4k83 is taken direct from a 35mm pre-SE print so there is zero chance that there is any special edition changes in there. Could you post some screenshots?
I can make a Docs file where are screenshots. But I remember clearly when editing that there were clearly some Special Edition footage. I am absolutely not sure if it was OTD83 or 4K83 but its color matched original 4K83.
OTD83 is a theatrical reconstruction that states that is is not a 100% faithful recreation as it used the UHD Blu-ray as its source. So it is more likely that you are using that as a source as 4k83 is 100% the 1983 pre-SE version