i have a similar problem.
and i dont think that its the room, but some kind of ramdon error, with some crash in the way we use the emulator, and may be some others programs (or virus) afect it.
my save data got erased from the emualtor very easy, ramdonly, making it rly hard to keep up to the end of the game. that happened to me in 3 diferent PC and with 4 Diferent games, i have downloaded the roms from diferent pals, and diferents websites, as well the emualtor.
its there any way to avoid that? or may be a external program or a patch?
i dont wana be anoying, just trying to help with some bug in future releases.
i think that this is basicaly a touch mode problem, looks like that, save the game using touch (mouse) can create some errors on data, or something.
now i have to make back ups, every time i play.