You asked for an example of multiple witnesses making the same wrong observation and I gave you one. Now you want to move the goalposts.

  STEVE - Thanks for posting that Bell still frame. To the (R) there is a Bench on the top of the steps. Below the bench is the Knoll Grass. Wiegman's legs/feet are on the same level as the Knoll Grass below that Bench. And there are Bell Film frames which include: (1) The Bench, (2) The Knoll Grass below the Bench, and (3) Wiegman MOVING (W) on the Knoll Grass.  Wiegman never said/wrote that he was "lying on the steps" while filming the Hester's, and no eyewitness has ever said they saw Wiegman lying on the steps. Plus, the Image Evidence does Not show him lying on the steps, or lying down anywhere at any point in time. Why would a professional photog do this, when he could film the Hester's while standing upright on the grass and/or go up the steps and film the Hester's from up there? This lying down stuff is disproven by the image evidence and makes absolutely no sense. Which is not uncommon for yet another JFK Assassination Urban Legend.

First of all, those were hardly all the witnesses who reported on the direction of the source.  I am looking for an instance where all the witnesses as to particular fact observation were mutually consistent but provably wrong.  Example: In this case, all the witnesses who were observing JFK and reported his reaction said he reacted in ways that are inconsistent with anything before z186.  Not a single witness said he continued to smile and wave after the first shot.

Second, sound direction is not a simple observable fact.  It is a complex process that relies on the brain's perception of a timing difference between the arrival of a sound wave front at each ear. Given the number and location of large reflecting surfaces, that sound difference will depend on the observer's location and proximity to reflecting surfaces.  We can see that in the way that observers' sense of sound direction varied by location.  Those closest to the rifle had no confusion about the direction of the source.  Those farthest away were confused.