"From the book . Ballroom dancing Analysed. Len Srivener.
Feather step. Tech. book wrong.
It says rise the end of 1. Up for 2 and 3. Lower end of 3."
Yes, that is what it DOES say. What it doesn't it what you had yersteday claimed - it DOES NOT say that the steps ARE AT THE SAME HEIGHT. Because they aren't.
You get confusede because the official technique says what you DO but not what the RESULT IS. In contrast, Scrivener describes the VISUAL RESULT.
To stay at the same height for step three of a feather, you would actually have to dance another rising action as you legs divided. You are not instructed to do this, the result of which is that you, without needing to try to, start downwads from the end of the second step. And then at the end of the third step, you dance the actual LOWERING ACTION in the legs and the feet.
Both descriptions are right, because the y are describing THE SAME THING. But one tells you WHAT TO DO (ISTD), and the other tells you WHAT IT LOOKS LIKE (Scrivener)