Skud Pai Sho and "Avatar"

[gal]

Are the rules making sense throughout the series? Because sometimes it's shown the game is played with tiled placed in the squares, while sometimes on line intersections (there are some snapshots in the Avatar wiki on Fandom). Is the White Lotus opening (done by the members of the White Lotus order as a secret greeting to identify members) making sense in Skud Pai Sho?