Just surfing on google and found this:
https://support.google.com/drive/answer/3541068
"Starting in March and April 2014, Google Sheets users creating new spreadsheets will be automatically directed to the new Sheets. All previously created spreadsheets will remain in the older version of Sheets for now. If you need to create a spreadsheet using the old Sheets, you can do so at
g.co/oldsheets"