[mythtv-users] Mythfilldatabase keeps deleting channels

[Mercury Morris]

Even though the three channels are in the channel table in mythconverg,
mythfilldatabase keeps deleting them.

Here's the log:
================================================================
2006-11-16 10:57:14.838 Updating source #2 (ATSC) with grabber datadirect
2006-11-16 10:57:14.839 Found 25 channels for source 2
2006-11-16 10:57:14.839
2006-11-16 10:57:14.839 Checking day @ offset 0, date: Thu Nov 16 2006
2006-11-16 10:57:14.839 Refreshing data for Thu Nov 16 2006
2006-11-16 10:57:14.839 Retrieving datadirect data.
2006-11-16 10:57:14.839 Grabbing data for Thu Nov 16 2006 offset 0
2006-11-16 10:57:14.839 From Thu Nov 16 06:00:00 2006 to Fri Nov 17
06:00:00 2006 (UTC)
2006-11-16 10:57:14.839 Grabbing listing data
2006-11-16 10:57:16.840 DataDirect: Your subscription expires on
01/06/2007 03:58:10 PM
2006-11-16 10:57:17.852 Grab complete.  Actual data from Thu Nov 16
06:00:00 2006 to Fri Nov 17 06:00:00 2006 (UTC)
2006-11-16 10:57:17.865 Main temp tables populated.
2006-11-16 10:57:17.865 Updating myth channels.
2006-11-16 10:57:17.868 DataDirect: Not adding channel KAALDT
(KAAL-DT) (KAALDT).
2006-11-16 10:57:17.868 DataDirect: Not adding channel WUCWDT2
(WUCW-DT2) (WUCWDT2).
2006-11-16 10:57:17.869 DataDirect: Not adding channel KTTCDT2
(KTTC-DT2) (KTTCDT2).
2006-11-16 10:57:17.869 Updating icons for sourceid: 2
2006-11-16 10:57:17.869 Grabbing login cookies for listing update
2006-11-16 10:57:17.880 Grabbing login cookies and lineups
2006-11-16 10:57:19.029 Grabbing listing for listing update
2006-11-16 10:57:19.029 Grabbing lineup PC:55009 for modification
2006-11-16 10:57:20.169 Saving updated DataDirect listing
2006-11-16 10:57:20.169 Saving lineup PC:55009 with 21 channels
2006-11-16 10:57:21.317 Removed 3 channel(s) from lineup.
2006-11-16 10:57:21.317 Channels updated.
================================================================

What does mythfilldatabase use to decide if a channel is a "new" channel?
Is it "callsign", is it "name", or something else?

If you have any idea what criteria mythfilldatabase uses to decide
when it deletes
a channel, please post.  Thanks!

-- 
MM