I would say that is regarding updates. The game doesnt update like a regular game or app...if you go to the "store" and search Restaurant Story, several different "versions" will be seen, all genuine. These are "updates". Install one by one, going to a neighbour or visiting community, coming back to yours, exit, uninstall...onto the next...you will find despite uninstalling, the recipes and objects from the installs will still be there.
Also take into consideration that SOME recipes and objects can only be obtained via goal completions ;)