What's also telling is how long the bugs stayed around, too. They were reported on Reddit and Apple's forums for awhile with various workarounds, like deleting the phantom entries from the SQLlite database manually and doing some other gymnastics like removing the other devices from iCloud in hopes that everything would sync up nicely. No one at Apple had the time or took the time to chase down the bugs. In a world of Claude Code or Codex you would think they would have at least tried a cursory "fix this".
On a related note, maybe one of these days iCloud will have a force sync option that tells the other devices to trash their copies vs having to remove all devices and re-add to get everything coherently synced.