KK tends to be quirky and will lose settings from time to time. Counter intuitively, especially if the folder containing the statics is inside the KK folder structure. KK can find any unique Static as long as it is in the GameData folder. So most times it is best to store your Statics in a folder in GameData that is out side of the KK folder structure. It will find them but be less likely to change the settings. This includes the config files that tell KK what static goes where in the game world and all other settings for your self created layouts.