Therefore if I want to decrease a file size I would be able to compress using zipx and create a zip/rar archive OVER my zipx archive. By the way 7z (7-zip) is an open source format which allow better compression. It also could be created in 7z format and cover it using a standard zip archiver. As seems to rar I am not sure if all of standard archivers support RAR5 format and the newest RAR7 format (WinRar 7.0 beta)Files ending with zip and rar are allowed. Since the extension becomes zip.001 it's being blocked. We are working on the issue.
I posted am issue in a bug section when I am able to edit to maim post and attach files to top post but I am not able to attach any file in commentYeah made a minor mistake. Should work now.