I'm going to post my screen shot for anyone interested. Will is correct that there is a duplication of OPNAME id's. However, the rest of the numbers are different. Draw your own conclusions.
Each controller snapshot is taken at a different time within a space of ~15 mins, the interval at which we monitor each miner instance (see elapsed column for # of seconds worker-instance uptime). The OPNAME is the serial number on the side of the box (add SR in front and 13 @ end, capitalize).