I've had that happen occasionally when I rip copies of LPs and cassettes, and it never ceases to mystify me. I remastered all of Debby McClatchy's LPs onto CD for her, and the track listings for some of those albums were in whatever database was hooked to my recording software - CDDB, probably. Still, if you look at Websites like allmusic.com or cddb/gracenote, you'll see they have track listings in their database for a huge number of LPs, and many of those LPs have not been reissued as CD.
-Joe-