If the folders are named anything but a number, they will no longer be indexed, but will still be read by Avid. So any new material added will not be seen.
So the folders in the Avid MediaFiles/MXF can be named:
1, 2, 3, 4, 5, or
10, 11, 12, 13, or
10, 20, 30 and they will all be seen.
If you rename one of then to 1A or 10-exterior after they have been indexed the content will be seen, but anything added afterwards will not. If this is the case, then rename the folder to a digit only name.
Michael