We all have played this game when we were young.
10 -20 people line up and a message is passed from one person to the next in line in a whisper. The message is passed on and finally returns to the person who started the game. 10 out of 10 times the message is totally unrelated to the original message.
This is the lineage game in Feng Shui. The teaching is passed on from one shifu to one disciple verbally and secretly. You can imagine how much Feng Shui you can learn that resembles, say, Yang Yun Song's original teaching if you learn from someone who claims to be a lineage holder of Yang Yun Song.
Get the moral of the game?