What this tells me is if it had already passed through the slit prior to viewing it, and at the very moment of the act of viewing it changes how it went through initially, then that might be a hint of the possibility of changing the past. Can it be similar to going back in time to change the present time?
Or am I reaching to far? Sometimes even the most preposterous ideas have turned out to be true.
I don't know, just a thought.