The Last Saved date when editing an article doesn't update, it is using the very first time/date that the article was first published. Is this something you will fix in the future?

Example:

First Published: (then have the date of when it was first published)

Last saved: (date of when it was last edited)

Then on the front-end of the article, we have both dates, something like,

Published on March 17, 2017 (Last updated March 18, 2017).

This is mostly for user experience, as users prefer to read articles that are more recently updated. In some tests it's been shown that showing the last updated date garners more users to view the content, whereas showing only the initial published date makes content feel "old," causing them to not read it. 

Thanks for your time, I'm looking forward to your response.