Bill,
If you paste itnto Excel, it cannot know that it was a csv file to begin with and doesn't do it's thing on the info.
If you save it as a csv file and then use Explorer to open the file with Excel, all should go as expected automagically.
On the other hand, going back to what you already have pasted into Excel, you can force the Excel parsing function.
Select all of the rows and do the following:
Data tab,? Text to Columns, Delimited, Next, Check "Comma", Finish
--
Gerald