I've had quite a few problems like this in ripping CDs. Many it just doesn't find, which is fair enough considering the obscurity of some of my CDs. I'm most puzzled by some albums where it is obviously bringing up the correct CD but with tracks in the wrong order or with/without some tracks or spelling mistakes. Some of this I presume is due to CDs being released with different tracks or track order in different countries but the spelling mistakes lead me to think that sometimes the first person to enter the CD details when the CD is being ripped (which then seem to get uploaded somewhere) and mistypes (or even puts the wrong CD information on) mucks it up for others that follow.