This might be a bug. At least, it's pretty confusing and I'm not sure if it's intended by webflow.
1) I created 3 pages with the following urls:
2) I linked the pages.
3) I changed the url of /testpage-c to /testpage-c-changed
The URLs inside the links updated to /testpage-c-changed, however, the old page at /testpage-c is still online with the old content and the old link to testpage-c!
I currently stumbled upon this bug in a large project inside webflow with many pages. I was editing the new-url-page in the editor but was previewing the old url (without noticing), wondering why my changes won't appear. The old links on the old-url-page add to the confusion.