Display Issue

Hi,

I seem to be have a display issue when I have embedded into a page. The formatting seems to be off and when you click check out you cant see half the pop up. I was thinking it might be related to my theme but it doesn’t look like it. Would someone be able to have a look and point me in the right direction? https://marinerescuekingborough.org.au/volunteer-portal/

Thanks
Ben

https://www.ads-software.com/plugins/row-seats/