I've been having this problem recently of files 'falling out' of the favorite lists they are in. Specifically, files that were previously assigned to a favorite list showing up in the unidentified list again. I haven't been able to find any rhyme or reason to this yet, but as I get some more info I will report back.
It seems this problem is rooted in the same 'illegal characters in filename' issue as with the 'unidentified files' from my other posts. I had a file with an illegal character in it that apparently was causing some other files to come up as unidentified. I moved that file out of the watched folder and haven't noticed this problem since.
The files was " 'Twas the Night Before Christmas" (I added the spaces so you could delineate between the quotes and the apostrophe). I tried renaming the file without the apostrophe, but it seems RTH keeps referring to it based on the TVDB listing, which has the apostrophe.
I believe it's TV. Mine is named " 'Twas the Night Before Christmas (1974).avi". I'm pretty sure this is the file that was causing the problem, as I moved it back into a watched folder and the problem returned. How do I specify it as a movie instead of TV? I thought that was done automatically by RTH.
The cause of this problem may actually be the opposite of what I reported. I have noticed that whenever a recorded show that isn't assigned to a favorites list is present in the 'non-favorites' list it causes some shows to 'fall out' from their assigned lists. The recorded shows are .wtv files that I record through WMC and the files that 'fall out' are as follows:
Frosty the Snowman (1954).avi
The Grinch Grinches the Cat in the Hat (1982).avi
Santa Claus is Comin' to Town (1972).avi
Just emailed the database file to you. I also realized I misreported one of the problem files in the post above. 'Santa Claus is Comin' to Town (1982)' was not one of the persistent files that 'fell out' of the favorites list, it was 'It's the Easter Beagle, Charlie Brown (1974)'. That file and the other 2 above always seem to show up in the 'non-favorites' list right after I record a new show that has not yet been assigned to a favorites list. I noticed another post on the forum where the parentheses and the year in the filename may have caused an issue. Might that be the case here? Also, I am using 1.7.19 beta, should I try 1.7.24 alpha?
I haven't had much time to look at the database, but under a quick glance it looks like at least a couple of those mentioned have a bunch of entries in the favorites list in the database when there should only be one. I'll have to test later and see if removing all of them and then adding them again fixes the problem.