You have to read the experiments of A. Aspect with dynamically changing configuration. Please search in the arXiv quant-ph (http://xxx.lanl.gov/list/quant-ph/0402) and you will find a long article, "Bell's Theorem : The Naive View of an Experimentalist". Go to page 26. You will see the description of an experiment in which the paths of the particles are changed so frequently, that the two photons cannot pass a signal from one another which answer to produce. All the more, the apparatuses cannot agree with one another what answer to produce.
Maybe this experiment will answer to your doubts.
Good luck,
Sofia