Some of the songs in my library are disappearing. What's happening?

If songs used to be in your library and now you can’t find them, it’s possible you turned on a filter to hide them from view. You can identify this by your song count in the top right of the list displaying as XXX/YYY. If you enter any song list, you can hold blue (or the equivalent of blue) on your controller to open a list of filters. Uncheck the one labeled ‘Hide 1-Rated Songs’ (or whichever happens to be adjusted) and you should be all set!