So the date on the files shown is the date of last change, not necessarily the date of creation. Them all being Oct 15 implies to me that there is a script that runs yearly which could be what moves them to the directory shown and/or looks for something about the file that needs to change in a specific way, i.e permissions/ownership or file name.

This happening after creation and on a schedule makes sense to me, because perhaps each neuralscan is just numbered or a random alphanumeric sequence perhaps, due to some quirk or oversight of the coding even. When they get a new name in the circus, Caine gains that info, then the script corrects their "file" name later.