^The writers aren't in control of what extras do in the background. That's the purview of the director, the assistant director, and sometimes the extras themselves. It's not at all uncommon for extras to improvise business to try to stand out and get noticed, since few of them want to stay extras forever. Sometimes they get away with it.
Besides, why would the producers choose to put a faux-Cameron in the background just a couple of weeks after they established definitively that she was leaving the hospital altogether and moving to another city?
Besides, why would the producers choose to put a faux-Cameron in the background just a couple of weeks after they established definitively that she was leaving the hospital altogether and moving to another city?