I believe they mean that when light acts as a particle, it should hit the shadow area, but it does not and indvidualy goes through either hole. Thus the photon chooses one hole or the other for some strange reason, and instead of light acting as a wave interference in the shadow area, it's more of a logical like switching that occurs, according to a certain clock.
This could have fantastic repercution in nano-computer development and "artificial intelligence" as it is more akin to the transistor effect. It also would mean there is no uncertainty...
Maybe there is no clock, maybe it is simultaneously acting as both particle and wave. Maybe this demonstrates other dimensions of space time, parallel dimensions...reminds me of the paradox that light has velocity but no acceleration.
walks away humming "Synchronicity"