problems generating/reading Code EAN 13

Topics: Code EAN 13
Apr 13, 2016 at 10:50 AM
Hello everyone,
I generated the code 123456789012 and reading it's ok but using the code 670000099149 the barcode reader returns 2120000991493 (difficult to read for barcode reader).
It's a known problem? Am I doing something wrong?

thanks in advance