Page Builder – Top stripe getting overwritten with a duplicate of the second

I'm using the one course child theme on instinctivecognition.com. I customized the top stripe, the parallax tile slide. The second slide is a customized "About" slide with only one instructor on it. This is a critical issue for my client--it's delaying the site's launch. I just made some changes this morning and when I try to save the changes, it overwrites the top parallax title slide with a duplicate of the About slide below it. This has happened once before. Is there a way I can recover the top parallax slide without having to recreate it? How can I prevent this issue in the future? You have an admin account with this site. If you need me to resend credentials, I'll be glad to. Just let me know.