Hi Paul!
Thanks for getting in touch with us! Let me try to help you with that.
That is mainly because your site’s header is fixed (always showing on the top of your page) and is hiding the tickets behind it.
If you switch to a default theme (like 2017), then you would be able to see all the tickets.
Unfortunately, there is no built-in way to modify that behavior, but you could customize the Buy Now button link so that it does not scroll down the page.
We are fairly limited in how much support we can give for custom development questions like that. But we always like helping out, so if you think you’d like that approach, I can provide you a snippet to accomplish that.
Let me know about it.
Best,
Victor