Hi there,
Thanks for reaching out. I’d be happy to help with your question.
I’m not sure why they chose to grey out the other ticket types when adding a ticket. I guess it’s because there is no built in cart for Tribe Payments.
In any case, when you get to the PayPal cart, there is a link in the top right that says “continue shopping.” Clicking this will bring you back to the event and allow you to add more tickets. The PayPal cart will remember all the events you add until checkout.
Hope that helps! Please let me know if you have any additional questions about this.
Thanks,
Sky