The woman with the backpack is shot in the left shoulder, then when TC treats her in the parking lot the wound is in her leg, then when she is inside being treated the wound is in her shoulder again.
The nurses are on strike outside the public entrance to the ER. The bomb blast was at the ambulance entrance, yet the nurses never come in to help until after SWAT had secured the building. Since it would take several minutes for SWAT to arrive, the nurses would have already been back inside the ER.