Why does the Google Drive integration creates a new PDF for edited submission?

Rather than simply editing the stored pdf, a new pdf is created when an edit is done. Is there any way to only edit the existing form and restore the new pdf or atleast store in same folder? I search for a pdf and I have multiples of the same every time it is edited.

Your last form ID is integrated to Google Drive and I think you mean the PDF file of the submission in the Google Drive folder. Well, there's currently no way of stopping this action of the form for edited submissions. A new PDF file will be created in the submission folder. 

You should be able to determine which is one is the newest since there is the date column. You can just sort the files.