Thanks for reaching out @junipercoyote and I’m glad you found a workaround.
In case you ever want to troubleshoot it, the issue seems to be that the second page of volunteer opportunities was being redirected back to the first page. You can see this by going to https://fishtrap.org/volunteer-at-summer-fishtrap-2-2/page/2/. Instead of landing on that URL, your website is redirecting back to https://fishtrap.org/volunteer-at-summer-fishtrap-2-2/. It’s a little tough to know the cause, but it’s likely your theme or a plugin. I’d suggest switching to the default WordPress theme and deactivating the other plugins on you site. From there you can test the pagination to see if it starts working. If it does, you can activate plugins and your theme one by one to see what’s causing the problem.
It sounds like you’re all set for now, but hopefully that helps if you change your mind. Good luck with everything!