Yep, same experience here. At the end of the first tour around the large house, the owner led me down into the basement. I was expecting laundry room/garage etc, but she flipped the lightswitch and illuminated a huge indoor pool! Down there was also an amazing cinema, sauna, bar etc… They also had not mentioned/shown that it the initial listing, for similar reasons.
Also, yes, being allowed to search on keywords would be fantastic. But, of course, aint never gonna happen 