Import data does not work - it says "less than 1 row" or other error
Please try using a different program to generate the CSV file. LibreOffice is a great free program that generates correct CSV files for importing. You can use LibreOffice ( http://www.libreoffice.org/download ) to open your existing excel spreadsheets and save them as CSV files.
Alternatively you could try using Google Drive ( https://drive.google.com/ ) as a free web based utility to open your spreadsheet and export it as CSV file again to see if that is any better.