I have problems exporting product data in Magento and I get this. Is here someone who had the same problem and know how to fix it?
Seems like your file has not been parsed properly by Excel. Go to the 'Data' tab and select 'Text to columns' option under data tools then choose 'Delimited' option and hit next. After select comma as the delimiter and hit finish.
I recommend to open the file with OpenOffice or LibreOffice - free spreadsheet program created to work specifically with CSV files. It offers to select delimiter used in file right when you open it.