Yeah it’s weird how they obfuscate some and surface different emails - this one seems to have both in normal and incognito mode: https://www.fastpeoplesearch.com/mark-lord_id_G-414558371175...

It's probably an attempt to maximize search hits. I wonder if they would always be provided if your user-agent matched google's webcrawler UA.

The last email address in your link, the sbcglobal one, is for someone else entirely. She's involved in the church in Springfield, IL. I assume that she got tied in by Mark's surname.