Hi Tracy!
Thanks for reaching out to us. I’d be happy to help you with that issue.
First, let me apologize for the delay in getting back to you. We are dealing with a high volume of threads at the moment and we are slowly getting back to normal response times.
I had a closer inspection to your site and it I can see the output for the filters is that of the vertical ones, so this looks like a conflict with your theme.
Could you please switch to a default theme (like Twenty Seventeen) and see if any difference?
If it shows fine on a default theme, then you could try using a different template in your theme by going to WP Admin > Events > Settings > Display tab and under Events template select a different one to see if any of them work.
Please let us know about it.
Thanks,
Victor