did anyone notice that ther are various symbols fir the storm in lakian? when I found the symbol for the last pedestel I drew it the other way round( not upside-down) on the slate and the bahro made a storm. the original symbol are those waves.
Has anybody else found out anything like that?

The symbol recognition system is not perfect, drawing another symbol than that intended by the designers may have unexpected results. See for example the thread Warning, possible "slate problem" in Myst V, and a solution - save, save, save! near the top of this forum.