My published dynamic list page loses format

Question:
I have a CMS collection for our team members and publish a Dynamic List page to show the team with a read more to a detail Item page.

The Published List page looks fine, then at later time I view the live site and it’s formatting has changed so I have to go back to the editor and correct it.

What could cause this and how do I correct it to avoid the need to check the live wesbite and then use the editor to correct changed formatting.

I have attached screen shot of the Live issue after I have previously corrected it, and the Editor View of the formatting issue and then the Editor corrections to remedy.

thanks