The One Secret You Never Noticed In The Matrix

In this unforgettable sequence, Neo is being educated in what the Matrix is by Morpheus in a special training simulation created by Mouse. After being distracted by a woman in a red dress, who Morpheus then reveals to be an Agent in disguise, Morpheus freezes the simulation to showcase how easy humans are distracted.

It's only upon closer examination on the 15th time you re-watch the movie (after you've been distracted by the girl in the red dress yourself) that you notice that there's something deeper going on here.

Upon close examination, some of the chosen extras in the scene (highlighted in the boxes above) appear to be identical to one another for reasons not obviously clear...