When scanning a new document, Adobe automatically pulls up the latest document when you have multiple Adobe files open. Adobe then automatically checks the box "Append to current document". This can cause unwanted pages added to a separate file that is being worked. Suggest you fix Adobe so that the Append Box is unchecked as a default and/or "create new document" or "append to current document" options are added that do not pull up the last open file automatically. Then if the user wants to Append to an existing document, they can, but it is then a conscious decision. I've had too many important documents corrupted by unwanted "appending" taking place after a scan, and the corrupted documents emailed before the mistake is discovered.