On a hunch I went through and removed the “&” from all of the RSVP “Ticket Type” titles and it works now. Does it say anywhere you can’t have special tags in the ‘Ticket Type’?
In the “View Attendees” it says there are 36 people (12 available) but there are only 40 spaces. The 12 available is reflected on the event list but not on the event detail page — where it says the correct 4 spaces.