your description is confusing. I am unable to diagnose what exactally what you are doing.
When I make mp3 disks, I can only play one song/track at a time
Are you trying to play two songs at the same time while burning a cd?
Bashee, Amarok, and Rhythmbox seem like the easiest for me to use, so that's what I have installed. Tried the rest, don't really care for them.
Yes, and you can create a play list rather than click the files individually. You may have to drag the files you want on to your music player.
I like Amarok. Many windows users prefer XMMS. I like that too. It works even if you don't know how to get W32 codecs working.