Can't register for Big Lasers class?

I’m trying to register for the 6:00 PM, BIG LASERS CLASS W/ TRAVIS on Dec 15th, which shows only 2 out of the 3 spaces taken here. But when I go to the registration page and enter my info, I see “There is no space available for this event at this moment. Please continue to fill in the form and you will be added to our Waiting List. You will be notified when we have seats available.” Should I just join the waitlist even though it seems there should be one spot left?

Yep, it is probably full though

It’s a website bug, it is full. It happens when two people get registered under one login.