OK, according to that, the folder with id 1, is the attachments2 folder and the folder named attachments has the id of 3. Which is odd since normally id 1 is the original attachments folder. Unless it was named attachments2 to start with.
That image which is giving you the problem, which folder is it in? attachments or attachments2?
Files with the old style encryption for the file name, are they only in one folder or in both?
Do you see any files with just the file name in either folder. These would be the first attachments uploaded going way back. If so, in which folder? Which folder is it in according to the database (1 or 3)? Also, can you view these in the attachments listing in the admin cp?