The Iron Man 3/The Dark World placement is just them going off TDW's opening scene set directly after The Avengers. I don't agree with it, but I understand how they came up with it. As for Eternals, I believe it's a case of the movie being produced as the first film set after Endgame but with Covid messing with their releases, they put Shang-Chi first since it was released first. Now that we're out of COVID schedule changes, I'm hoping the Disney + timeline can be more accurate, which to me it has been past Eternals.They have screwed up their own timeline on there in the past so I won't ever see them as accurate. I will always defer to any other source than their placement. Do I think that they help outside sources place MCU entries? Sure, but I still don't think they are the absolute say on this. IM3/Thor 2 is wrong for starters, as is Eternals.