Channels are added in 'setup' -> Television --> TV Channels if the Recording directory is listed as a Move share under Movies --> Movie Folders

h4. Steps to Reproduce
1. Add you Recorded TV directory under 'setup' -> Movies --> Movie Folders
2. Exit 'setup'
3. Record some TV channels in MP
4. Exit MP
5. Delete your TVDatabase file
6. Start 'setup'
7. Go to Television --> TV Channels

Note: The TV channels of the shows you recorded will be in the channel list with channel 0 set.

h4. Additional Information
http://nolanparty.com/mediaportal.sourceforge.net/phpBB2/viewtopic.php?t=5054