If you change or edit the "Number" or "Title" column it doesn't automatically update / change the Document Name. It looks like once you do the initial upload the only way to change is delete the sheet and start again. Kinda doesn't make sense then you are able to edit the "Number" or "Title" because it really doesn't do much because the document name is what is sent to the iPad / iPhone. We need flexibility to change names and those updates end up going to the iPad / iPhone.