Layout in Divi-built site has changed on pages but not post

I built my site last year in WordPress using the Divi Theme. Everything has gone well until last week. The layout has changed in my Home Page, About Me, Services and Contact Page. The posts/blog are intact. In Divi I used the Corporate Layout Pack and then customized it. The only things I can think of to restore what I had is:

1. I recently integrated with a Learning Management System, although they claim that there is no issue. Yes, they are a third party but not considered a plugin.
2. I just got your regular email that assures me that my theme and plugins are all up to date. Did that affect my site?
3. After trying to get a solution from Divi they said to search for a plugin issue by going into Safe Mode and disabling all the plugins to see what is wrong but that could cause a fatal error in my website and I could take the whole site down. I’m therefore afraid to do this.
4. I asked my hosting company to go back to the site version from 2 weeks ago from their server but that didn’t work.
5. I just don’t know how to get my previous website version back with the nice layout. Yes, I do have the UpdraftPlus plugin.
6. Any ideas for me to resolve this? Thanks ahead of time.

The page I need help with: [log in to see the link]