Alias? Create two sheets?

What is this Alias in the output? When there is something in that box, it creates two sheets in my workbook and I have no clue where that data is coming from. If I leave it line blank it highlight wants me to input something in it. I worry it messing up the data I actually need. How do I make sure I only get one sheet with the entered data?

The ‘Alias’ field is used in batch processing and command line arguments. When you refer to an input or output in batch processing or command line arguments, you refer to the alias. It shouldn’t make any difference outside that.

Note that if the Write mode is set to Overwrite/Sheet then existing sheets won’t be removed from the Excel file.