SDF always shows as "CTR broken" for card1 games, how do you have them installed as .cia, .3ds or .3dz, if its cia the saves wouldn't be on the SD card like normal games, they are stored somewhere in the "nintendo 3ds" folder, if they are stored as .3ds on the gateway card they will not use the built in header so changing it has zero effect anyway, but the saves would still be stored on the SD card like all other games, and if its .3dz then changing the header would of deleted the saves, and the save would of still been on the SD card