Why Creating Another Workbook When I Run This Code

I have a workbook with four worksheets named
FilteredData
FilteredDataFormat
array
arrayFormat

The two sheets named FilteredDataFormat and arrayFormat exist strictly to preserve headers , and column widths.

So that for convenience sake I can clear my data without specifying a range that excludes the headers.
I simple clear the contents of the 'FilteredData' and 'array' then copy and paste 'arrayFormat' and 'FilteredDataFormat'.

Sort of an unconventional and lazy approach but I see no reason why this will not work.

Here is my original code and what happens is that excel creates another workbook for some reason unknown to me