@paulska

1 - Is this a problem with the gamelist, would I recommend that you use external software to update your gamelists like Skraper or ARRM:

2 - Unfortunately I'm not sure what that might be, I recommend you do a reset to factory settings (available through the advanced settings menu). This reset does not erase any personal information (keeps all games/BIOS/saves, etc), but it does delete all custom settings.