I have an event that shows unlimited capacity. (which is correct)
I had 11 people registered for the event. I had to make a couple adjustment to the event fields.
Now the event still shows unlimited and 11 registered, but when someone try's to register they get a message saying the event is full but are offered to be added to the waiting list. Which is another problem because the wait list option is disabled.
I had to change the event again by putting a cap limit of 200.