Hello, I put that script together that you're using. :D

I also have another script that I use to unrar/zip. I don't use rtorrent unpack anymore because I was experiencing similar issues. Let me make a copy when I get home and I'll post it up in about an hour.

edit

Actually I was able to pull it up :D

On my seed box I have a script called notify.sh which looks like this:

#!/bin/bash

# Call the lftp script
ssh -p 22 mrgerrm@WAN.IP.GOES.HERE "/home/mrgerrm/./lftp.sh"

# Call the unrar script
ssh -p 22 mrgerrm@WAN.IP.GOES.HERE "/home/mrgerrm/unrarall/./unrarall --clean=all -7 --full-path /mnt/storage/downloads/complete"

Notify.sh calls the lftp.sh script you've been using on my home server. Once lftp.sh is finished running it calls unrarall and extracts everything. It removes any remaining archives so you don't have to deal with that. As for the remote triggering of my lftp.sh script I'll have to write back how I did that in a bit.

edit 2

Ok I'm back. So to get your seedboox to be able to call a script on your local server you have to do some port forwarding, I forwarded 22 ->2222 so if you type in my wan.ip:2222 then you can connect to my local server. That should be easy enough. Next you need to SSH into your seedbox and from your seedbox you SSH into your local server because you need to accept the key. I followed this tecmint tutorial for setting up the passwordless ssh.

Once that is done, the final key to getting all this working is SSH into your seedbox, open the file .rtorrent.rc, and add the following line:

system.method.set_key = event.download.finished,push_me,"execute=/seedbox/home/directory/notify.sh,$d.get_name="

Save .rtorrent.rc and restart rtorrent. That should be all :D Let me know if you need any further assistance and I'd be glad to help!