Format reverting to previous version or altering with a delay after save

First, we did all of this:

Clear your browser cache.
Clear and deactivate any caching plugins (keep them deactivated if you need to post your topic).
If you have server caching in place, disable it.
Deactivate your other plugins one by one to check for conflicts.
Make sure you're using the latest version of the theme: 2.4.2
Make sure you're using the latest version of GP Premium: 1.10.0

...but our pages are getting wacky several minutes or a day after making minor changes, even though it looks good initially, such as the left-hand justification and image weirdness seen here:
https://www.awesomescreenshot.com/image/5025620/56481709a98ae3b13ba332ae508c6d59
moz-extension://04c0aa88-48c3-42e9-be97-d645b6de2b21/edit.html

Clicking on full width isn't a lasting fix: https://www.awesomescreenshot.com/image/5026375/f8be361c9513beecfed5085c6a5accb2

Thank you,
Stephen