Like macemoneta implied, the problem is likely not with Amarok, but with faulty metadata of the audio files (ID3 information of your mp3 files). You will need to change the metadata in order to get Amarok to handle the files correctly. EasyTAG is one of the tools you can use for this, but you have other choices too (ExFalso, Kid3, and many many others). I think it can even be done in Amarok itself, but as I don't use it myself I really don't know how.
Notice also that there are two versions of ID3, the older 1.x and newer ID3v2. The older version is really limited, so my suggestion would be to use version 2.
Last edited by alienDog; 10-24-2011 at 06:49 PM.