Consider the situation from the perspective of the interviewer: They don't have all of the background we did while reading this blog. They haven't even had time to process what Connor #1 said by the time that Connor #2 arrives.
The decision to hear them both out for a few minutes is reasonable, IMO. At that point in time, Connor #1 could have been lying as far as the interviewer knew. Letting them both exist in the meeting immediately cleared up any confusion.