I get the impression that the Googled old page is no longer available and the new page takes time before it is discovered and added to the Google index.
Maybe try this although all your pages should have a caononical link
// Old "comma" with New "dashes" page
<link href="http://www.yoursite.com/new-page-with-commas.html" rel="canonical" />
Google will hopefully acknowledge the canonical link and update their database.
Google "canonical headers" for further information.
Shold i wait another day to see if my results back to normal or to reolace them straight away .
I would wait far longer than a day to expect any changes to be noticed.