When importing the created excel files (excel5 and 8) in other programs extra columns F3 F4 ... F10 are show
I found this by using SPSS: http://www.spss.com/software/statistics/
Also can be found using: http://www.jklnsoft.com/convert-xls/
Attached is a program that creates a 2 column spreadsheet and the exported text
demo
exported text
If the file is open and saved by openoffice the extra columns are not show