And it's ultimately not our concern if the creator gets upset over that because they made a mistake putting in conflicting data to begin with.
We don't really know the intent of the original creator.
This is no different to how a library would operate. They do not conform the card catalog to the users. They would not put a book in a wrong section because somebody had come by once and moved it, even if 13 people kept moving a specific book to the wrong shelf.
We base the intent by the origin data. The important aspects are the art selected, item number and barcode. If this origin data is not present and was then added later and it resulted in a franken entry, then yes we would reach out to someone who had it in collection to verify what they own and fix the entry. This happens all the time behind the scenes.
If this entry was created as a "blank" or title-only entry, and AU pictures were added later, then yes, we would change the entry to the "yellow dot" release. It wasn't. The item was created with AU pictures, so the item should be moved to AU category. It is not uncommon that EU people add AU games to EU categories, because of the simple fact that you can find AU games in EU because they were imported. You can find AU games on the various EU Ebays quite easily. It is no different from other real-world examples such as EU SMS or Atari games being available in the secondary market in the US, and people have added those EU releases to NA categories here. At least the SMS categories have been fixed in this regard, but the Atari console cart sections still have EU games in NA.
What I really wish for tho, is that there could be some sort of notification system (opt-in of course) where if you have an item in your collection and it had its box art, barcode or category changed, that you could get a notification of it. Then you could adjust your collection if you wanted to in case you had added an item by mistake, or maybe you added a franken entry that got fixed, etc.
EDIT: yes, change your entry you made to the EU yellow dot if you have the art, move to EU category.
I will take care of the other entry now.