You'll want to edit the trackers of any existing torrent to remove all non-BakaBT trackers, after you add BakaBT. To be specific, when you d/l the .torrent file from BakaBT that matches one that's already in your queue, your BT client will ask if you want to add BakaBT as a tracker; do so, then remove all the others (including DHT). Tghis does not, of course, apply to content that is NOT in your queue still from when you downloaded the content.