Custom page does not update

Describe the issue or problem
When the custom page is edited and saved, the edits appear in the preview, but not in the live site. I tried clearing data and template caches, as well as clearing the cache on several browsers.
Then I tried deleting the page altogether, but it still appears. I had the Static pages plugin enabled but was not using it. I disabled it, but it did not solve the problem.

Steps I took leading up to the issue
I edited the custom page in the Navigation section of Setup.

What application are you using?

Thanks in advance, soj