http://sigma.i2p/post/119
BiglyBT has its own backup update server and tracker for update torrents in Tor, but clients download those over clearnet (or I2P). To be able to make connections to peers on .onion addresses, you have to make non-obvious changes to settings to route peer connections through Tor proxy. If you were the one who decided to do that, you would certainly understand how and why that works (even without the official support).