Strange thing just happened. I have and event where I marked the customer as paid on the back end. I just changed the dates on the event in Jevents, then went to RSVP pro, and see that the customer has money bags. So I clicked on money bags and I got an error message. That said the customer ID does not exist. When I went back the customer is gone. I've had to re-enter the customer manually.
There is another event where I have multiple paid customers and yet the event is showing no participants in RSVP pro - sessions page.
Not sure why.