The seed and peer counts were disable for local torrents because they broke, they're often inaccurate for external torrents. Ratio tracking was disable because DaTorrents no longer bans leechers and there were some questions as to the tracking systems accuracy. As for torrents saying banned, it's a glitch and as result all torrent say they're banned when they in fact are not.
There have been a few threads on the issue, one which is
http://forums.datorrents.com/showthread.php?t=5655