They are legit .cia files from that site and one I ripped off a friend game cart. Tried to install with and without signature check disabled. Both installs for each did take their sweet time, but once installed not found anywhere on home-menu or space taking on SD card or available on eShop for re-download.You're trying to install a non-legit cia without disabling signature check, most likely. Does the installation go faster than usual? If so, it's not actually installing it.