Hey @Carlas,
Thank you for reaching out. I’m sorry for the trouble here!
I believe that what is happening on your site is actually the correct behavior. The problem is our wording of things in the admin options. If you notice, the description for the flat fee option says, “The flat fee charged for each event in an order.” (emphasis mine)
In your cart, there are three tickets, but they are all to one event. And so the flat fee only gets applied once.
We should make the other label more clear, as it currently says “per-ticket”, which should be “per-event”. I will check with our developers to confirm if this is indeed an error/typo.
Sincerely,
George