1) It's technically fixable.idk if anyone has noticed this or reported this but i was checking my catalog in the game as i was doing some of gracies fashion checks and i noticed that there are some piece of clothings, items, wallpapers and floorings that appear as ???. it shows what im assuming the item should be but the name is ???, it says not for sale and i think the image that is a duplicate. i also noticed that after using the fill catalog cheat the music and paper doesnt get filled up. i tried the cheat again just to make sure it wasnt me forgetting to do it when i restarted my game but it still doesnt fill those two. i thought maybe it was something with the checksums.. but anyways, maybe is there a way to fix it?
2) A thing to note is the game doesn't store catalog, encyclopedia, etc separately. It's actually just one big bit field, so I assume that the save editor is missing out on the music and wallpaper in that (which it is, I noticed it myself a few weeks ago).
3) The ??? are actually items that were scrapped. The devs then just copied over an existing model to the item and removed the name, which is why it has the ??? and looks like it's a duplicate to other items.
Hopefully that clears something up