Quote - > Quote - set to emit a single photon.  Now, according to Relativity, there is only one photon,

You said Relativity and here is the problem. Relativity ignores Quantics, Electromagnetism and the wave nature of light.
A single "photon" can pass through two holes at the same time and worst!.... an electron also can do it!
Relativity is a limited theory with a limited scope of application. A simple phenomena as difraction of light is impossible to happen for Relativity.

And Yes, God do play dice and Devil can do even worst things...

And there, young sir, you have it all.  

Coppula eam se non posit acceptera jocularum.

My Store

My Gallery