I had two links generated for the same webinar? What could have happened?

Hi, a couple weeks ago I created a webinar (as per normal process - nothing different). And that usually creates a registration link which I normally share with my registrants so they can join on the day.

But once the webinar started, I noticed we only had 3 participants (normally we have 50+) and so I went and tested the link that was sent to registrants. And the link was leading to another webinar with the exact same title and exact same settings....just a different ID. Can someone help me understand how in the world this could have happened if I only had one webinar created? 

Thanks!