Looks like people are adding releases again, but the missing ones aren't added. Don't know why, who cares if they are old releases and get a "new" catalog number. Same would happen with an old, distinct cart version that for whatever reason never got dumped before.
Also 1173 is the only DLC release (for some German game), that must be there in error as none of the other DLCs are included. I'd suggest using Dnnnn for DLC, Unnnn for updates, Knnnn for Kiosk versions, Xnnnn for other (DLC unlockers, trainers, etc.).