I guess what we dont see if why your singling out the display of the preview thumbnails sort order on bulkupload. They are not affected by any sort. They are uploaded as noted by simple reading a directory and processing files in order they are found. Same thing does reading an html file. we should go down the file and read every img src tag and grab images. How the server is interpreting the sort order of the directory when we read it I can not say.
Well... I can understand that FTP bulkuploads may be affected by the directory sort on the server but what about URL?
I mean, try it. Try uploading from a URL (usually vbulletin thread pages
) and it does not go top to bottom when displaying the thumbnails on the bulk uploads... maybe its user error?