It's definitely something at your end. I just tried a green torrent from Torbox and got sustained throughput of 10MB/s. I was connected to both CacheBT and btcache, Try this, load a green torrent from Torbox but don't start it. Delete all trackers and add
http://10.240.254.99:7878/announceNow start and see.
http://10.240.254.99:7878/announceNow start and see.