Subtotal: $94,765.00
I created a structure with a few fields and a file upload control. Everything saves correctly. When I edit the record the items are not populated back into the file upload control which makes sense because they are already uploaded. They are also in the assets folder as expected.
However when you submit from the edit page the file links no longer show up in the list/table views. It looks like the files have been disassociated with the row. The records have also been cleared out of the database.
Use the Asset Field instead; it has the option to "Allow Uploads" as well. Asset Field maintains the reference when editing...
Upload Control will overwrite any exisitng saved records.